Rodentia

“ If we contrast the fearless disposition of the harvester with the timidity of the hare or rabbit, we observe that in respect of emotions, no less than in that of intelligence, the order Rodentia comprises the utmost extremes.
The so-called 'prairie-dog' is a kind of small rodent, which makes burrows in the ground, and a slight elevation above it. The animals being social in their habits, their warrens are called 'dog-towns.' Prof. ”

“ An almost equal degree of doubt obtains with regard to the ancestry of that very compact and well-defined group the Rodentia. If, however, the so-called Proglires of the lower Eocene are really ancestral rodents, the order is brought into comparatively close connexion with the early generalized types of clawed, or unguiculate mammals. Whether the extinct Tillodontia are most nearly allied to the Rodentia, the Carnivore or the Ungulata, and whether they are really entitled to constitute an ordinal group by themselves, must remain for the present open questions. ”

“ The animals of the order Rodentia are only occasionally carnivorous. All possess long incisors furnished with strong chisel-like edges, and with these they are able to gnaw their food, from which circumstance the name is derived. ”

“ They are perfectly harmless, and live on small animals, chiefly the rodentia; occasionally the steinbuck and pallah fall victims, and are sucked into its comparatively small mouth in boa-constrictor fashion. ”

“ It should awaken a generally greater interest in our native mammals, and this will help build up a desire for the conservation of the harmless and useful species such as has resulted from the public education in relation to our bird life. On the other hand it is important to be able to distinguish those mammals, chiefly of the order Rodentia, which are thoroughly inimical to human interests. People at large must know how to cope with these enemies. ”

“ There are no canine teeth at all; consequently it is easy to recognize the skull of a rodent by its dentition. The animals are mostly small, the beaver being about the largest; while some kinds of mice are hardly more than a couple of inches long.
Seven species of rodents have been introduced into this country at one time or another. Of these, three species of rat, the mouse, and the guinea-pig belong to the simple-toothed rodents—that is, they never have at any period of their life more than two incisors in the upper jaw. The rabbit and the hare belong to the double-toothed rodents. ”

“ The rodents, psychologically considered, are, of all orders in the animal kingdom, most remarkable for the differences presented by constituent species. For while the group contains many animals, such as the guinea-pig, whose instincts and intelligence cannot be said to rise above the lowest level that obtains among mammalian forms, it also contains other animals with instincts as remarkable as those of the squirrel, intelligence as considerable as that of the rat, and a psychological development as unique as that of the beaver. ”

“ Whilst man is busy killing off the carnivora and the birds of prey, these natural checks to the multiplication of the Rodents are being missed seriously, and Rats, Hamsters, and Voles prove a serious menace to man's agricultural produce, and the Rat to his health owing to its instrumentality as a carrier of disease.
A distinctive character of the Rodents, additional to the chisel-teeth and the absence of canines, is the possession of hairy linings to the mouth, the external skin being continued into the sides of the mouth behind the upper front teeth. ”

“ Seeing him without delusion, plain and real in the half darkness.
I could not hear footsteps. If I heard any sound at all, other than the wind and the night noises, and the roll of my own blood in my veins, it was a faint rustling and fumbling along the wall of the corridor. I would have thought it was some rodent, crawling along the walls some four feet above the floor, if it hadn't been for the unmistakable impression that this thing covered more space, embraced greater distances between his touches, than any rodent that man ever heard of. ”

“ During all my life I have had a sort of instinctive antipathy to rats—I might even say a dread of them. This feeling was stronger while I was only a boy; but, although I have since encountered animals of a much more dangerous character, and fought with some, I do not remember any that ever inspired me with more fear than I have felt in coming in contact with that common and ubiquitous creature—the rat. It is a fear blended with a feeling of disgust ”

“ Thus the rat, the most perfect sample of the rodent order, possesses a digestive tube of a prodigious length, through which the scrapings of wood have plenty of time for travelling, while the minute nutritive particles they contain are being thoroughly disengaged; and as every part of the animal organization tends towards keeping our insatiable rodents in the constant state of voracity required by its inexorable pulps, nature has given it an enormous heart whose size exceeds even that of its stomach. ”

“ I then resolved to hold my job just as politicians and policemen do.
“‘Foxy and I have come to an understanding with our rodent friends, and with a little care on their part, we have managed to avoid all suspicion that we are not attending strictly to business.
“‘Once in a while I pick up a dead rat or mouse in the alley somewhere, and leave him91 around where the old man is sure to notice him—see? Sometimes a strange rodent blows in here, and forgets to bring his pull with him, and we nail him to the earth in great shape. ”

“ So that, it would seem, the greater periodicity of the instinct in the wild state, alike in animals and in man, is associated with greater violence of the manifestations when they do appear. Certain rodents, such as the rat and the mouse, are well known to possess both great reproductive power and marked sexual proclivities. Heape suggests that this also is "due to the advantages derived from their intimate relations with the luxuries of civilization." ”

“ Some persons profess to think that the Rodents called Rats are beautiful animals; and I presume that, prejudice apart, the sleek skin, the sharp head, the long, slender tail, and the keen look of their bright black eyes, ought to be attractions; but those who have been annoyed with these animals as I have been, can scarcely regard them with anything but dislike. Overspreading the whole world as they do, it is no wonder, where they are not vigorously checked, and where food is abundant, their numbers should amount to something frightful. ”

“ What would be thought, we might be asked by writers of this school, of a rat which developed upon its side the hand of a man, with all its mechanism of bone, muscle, tactile sensibility, and power of delicate manipulation, if the remainder of the creature were true to the pattern of a rat? Would not the rest of the rat tribe be justified in leaving this anomaly behind to starve in the hole where his singular appendage held him fast? Is such a rat any the less a monster because man finds use for his hands. ”

“ I heard what resembled the pattering of little feet, as of the rat running over the lid of an empty box; and once or twice I clearly distinguished the short, shrill cricket-like “chirp” that rats are wont to utter. I can think of no more disagreeable sound than the voice of a rat, and at that time it sounded doubly disagreeable. You may smile at my simple fears, but I could not help them. I could not help a presentiment that somehow or other my life was in danger from the presence of this rat, and the presentiment was not a vain or idle one, as you shall afterwards learn. ”

“ He stays in one place, with bent back, and has small interest in anything. If you cut one of his genital ducts, however, which is a comparatively slight operation, it has the effect of making the interstitial cells multiply actively. Waves of life flood his being. Within a few weeks he is transformed. These currents restore and rebuild him; skin, muscle and mind. Both in looks and behavior he is indistinguishable from other strong rats.
He has cast off old age. Senility, which sets in with men when they are from sixty to eighty years old, begins after twenty to thirty months in a rat. ”

“ And similarly, though less obviously, is this the case with the instinct of storing food for winter consumption, which is more prevalent among the rodents than in any other order of mammals—rats, mice, squirrels, harvesters, beavers, &c., all manifesting it with remarkable vigour and persistency. Here we probably have a case of similar organisation and environment determining the same instinct; for the latter [354] is not of sufficiently general occurrence among all species of rodents to allow us to suppose that the species in which it does occur have derived it from a common ancestry. ”

“ The word rodent signifies gnawing, and is given to these creatures because their front teeth are specially formed for the purpose of gnawing hard substances. You know, of course, how long and sharp the front teeth of a rat or a mouse are, and how easily these animals can nibble their way through a stout piece of board. Well, all the rodent animals have these teeth formed in just the same way. ”

“ These molecular changes were transmitted to the cerebral cells of progeny, became, in short, racial memories. Thus, when you and I, asleep or dozing off to sleep, fall through space and awake to sickening consciousness just before we strike, we are merely remembering what happened to our arboreal ancestors, and which has been stamped by cerebral changes into the heredity of the race.
There is nothing strange in this, any more than there is anything strange in an instinct. An instinct is merely a habit that is stamped into the stuff of our heredity, that is all. ”

“ It is common to find well-beaten paths from the animal’s “front door” to the forage areas. Moving about on a grassy slope the fat, lazy rodent seems anything but alert, as he crawls from one spot to another. But the observer soon becomes aware that the chuck’s pauses to survey the landscape are frequent; his head is raised, if no danger threatens his tail flips and feeding is resumed. If frightened, swift retreat is generally preceded by the shrill whistle, and the sluggish, crawling fat one becomes a scurrying bundle of fur following a well-worn and familiar route to the sanctuary of his den. ”

“ THE RATTER Of the many annoyances and discomforts of camp and trench life, the rat is the most unwelcome. This species of the rodent family infests these places and not only becomes a pest, but a menace to the health of the soldier. ”

“ The domesticated rabbit becomes tame from close confinement; the dog, intelligent from associating with man; the retriever is taught to fetch and carry; and these mental endowments and bodily powers are all inherited. Nothing in the whole circuit of physiology is more wonderful. How can the use or disuse of a particular limb or of the brain affect a small aggregate of reproductive cells, seated in a distant part of the body, in such a manner that the being developed from these cells inherits the characters of either one or both parents? ”

“ From what precedes we may conclude (1) that in this series of rats the somatic character (appearance) of an individual is in general a true indication of its germinal character, since the higher the grade of the parents the higher the grade of the offspring, and vice versa; but that (2) the somatic character of an individual is not a perfect index of its germinal character, since the offspring of aberrant individuals are less aberrant than themselves, i. e., the offspring regress toward the mean of the race ”

“ Our scientists in eugenics gather hosts of facts, showing by elaborate statistical figures that the family history of neurotics reveals stigmata of degeneration in the various members of the family. The eugenic inquirers do not stop for a moment to think over the fact that the same sort of evidence can be easily brought in the case of most people. In fact, the eugenists themselves, when inquiring into the pedigree of talent and genius, invariably find somewhere in the family some form of disease or degeneration. ”

“ Seeing that the unfit are at present able to survive; does nature end or mend degenerate stocks, or have the lines of neuropathic inheritance only been partially cut off by this tendency to "anticipation"? What we want to know is: What is the fate of all the offspring of an insane parent or parents; for there are a great many facts which show that a disease may be latent and re-appear in a stock when the conditions of mating or environment are unfavourable? ”

“ The brown rats looked at the warrior with keen, wondering gaze, while Whiskerandos calmly continued, “I lost my ears in single combat with a ferret; he who exacted the toll lost his life in exchange, and I feel somehow persuaded that you will rather politely guide me into your house and share with me whatever I get there, than try the experiment whether a rat can fight as well without ears as he once did with them.” ”

“ The rodent’s head and front part of its body is pure black, while the other half is snow white, excepting a black line running along the center of its back to the tail. The rat is still in captivity, and the owner has been offered ten dollars for it. ”

“ Inequalities in the two sides of the body, though opposed to the law of symmetry, may be transmitted. There is ample evidence that the effects of mutilations and of accidents, especially or perhaps exclusively when followed by disease, are occasionally inherited. There can be no doubt that the evil effects of the long-continued exposure of the parent to injurious conditions are sometimes transmitted to the offspring. So it is, as we shall see in a future chapter, with the effects of the use and disuse of parts, and of mental habits. ”