E. Raymond Hall

“ For this reason we feel that the relationships of this population are best shown by arranging muralis as a subspecies of Thomomys bottae; the name should stand as Thomomys bottae muralis Goldman.
As far as known, T. b. muralis is completely isolated from other [Pg 360] populations of pocket gophers by uninhabitable eroding cliffs. The animals have been found only on isolated terraces in the lower end of Prospect Valley (itself a lateral pocket) within the Grand Canyon of the Colorado River, Hualpai Indian Reservation, Arizona. ”

“ Our comparisons indicate the correctness of Howell's identification of the specimens from Glacier Basin; they more closely resemble ludibundus than caurinus. The specimen from Reflection Lakes, however, is only one of five or six from the same place; the others were lumped by him among the 49 that he recorded from Mount Rainier under the name caurinus. The series from Reflection Lakes, so far as we can detect, is not unusually variable and the differences that are apparent are within the normal range of variation ascribable to season, age, and individualism. ”

“ There is one specimen of pocket mouse (18213, a skin only) from 30 miles east of Parker. We think that this is the specimen seen by Bole because at one time according to the label, it had been identified as Perognathus panamintinus [= longimembris] bangsi. If the identification of this skin-only had been made by means of Osgood's key (N. Amer. Fauna, 18:14-15, September 20, 1900) , the animal would have "keyed out" to P. longimembris because the total length is recorded on the label as 130. ”

“ The characters which Goldman (loc. cit.) set forth as distinguishing muralis from other named kinds are readily apparent and, like Goldman, we see no evidence of intergradation. Nevertheless, the characters which serve to identify the race are, in a general way, those commonly found in populations of depauperate individuals of Thomomys bottae and T. talpoides. The small size, delicate structure, well-inflated braincase, short premaxillary tongues, and strongly recurved upper incisors, often appear in populations existing in inhospitable areas of shallow, unstable soils. ”

“ We have examined these specimens and find that they lack the broad braincase and narrow nasals of clusius and in these and in other features the three specimens resemble T. t. caryi and T. t. bullatus more than they resemble any other named kinds. Although structurally, and in color, intermediate between the two subspecies named immediately above, the specimens show greater resemblance (large size and narrow braincase) to the latter and are referred by us to Thomomys talpoides bullatus. ”

“ Comparison of specimens of T. b. mohavensis and T. b. pascalis from various localities show T. b. pascalis to be larger (including the skull) , darker, and to possess a more nearly vertical occipital plane, wider-spread but less angular zygomatic arches, less inflated tympanic bullae, wider braincase (which consequently appears to be less inflated) , proportionately longer and slenderer rostrum, and broader nasals distally. ”

“ When one of us (Hall, Mammals of Nevada, p. 360, July 1, 1946) reported specimens from southwestern Nevada as Perognathus longimembris panamintinus he did so on the basis of study of specimens which included those from Oasis (in the California Museum of Vertebrate Zoology) that he at that time (in ms.) identified as P. l. panamintinus. Those specimens from Oasis have the hair on the underparts white all the way to the base as also do specimens from Morans, 5000 ft. (29583/41638 BS) , in contrast to the plumbeous underparts of P. l. nevadensis. ”

“ The rosaceous tone of these pale individuals is more as in some populations of T. t. ocius and T. t. clusius to the southward. Also, the skull of the male, although large, is distinctly narrower than in T. t. bullatus and we think shows the influence of the T. t. tenellus stock. All features considered, we refer the specimens to T. t. clusius. [Pg 364]
Thomomys talpoides glacialis Dalquest and Scheffer
Vernon Bailey (N. Amer. Fauna, 39:119, November 15, 1915) listed 19 specimens from Roy, Washington, as Thomomys douglasi yelmensis Merriam. ”

“ Additionally, Ord described his animal, although admittedly inadequately (small, black, not S. niger) . The name Sciurus Pennsylvanica Ord is clearly not a nomen nudum and must replace leucotis Gapper.
Allen's (loc. cit.) argument that the specimens were not representative of "leucotis" because they were from the Middle Atlantic States is based on an initial misunderstanding of the locality. Further, whether or not "topotypes" are representative of a subspecies has no bearing on the availability of the name appended to them. ”

“ Osgood (N. Amer. Fauna, 28: 171, April 17, 1909) listed two specimens from Crooked River, 25 miles southeast of Prineville, Oregon, as Peromyscus truei gilberti with the notation "approaching truei?" Subsequently, Bailey (N. Amer. Fauna, 55: 188, August 29, 1936) named Peromyscus truei preblei with type locality at Crooked River, 20 miles southeast of Prineville, a place from which Bailey had two specimens. We think the specimens recorded by the two authors are the same, and, according to the specimen labels, were placed correctly as to locality by Bailey. ”

“ We perceive the differences that Mearns (loc. cit.) described and recognize P. merriami as a species separate from P. eremicus.
Also we have compared the type and one topotype of Peromyscus goldmani Osgood with the holotype and referred specimens mentioned above, of P. merriami, and feel that the two kinds are no more than subspecifically distinct. Accordingly, P. goldmani should stand as Peromyscus merriami goldmani. This arrangement is made with the knowledge that Burt (Misc. Publ. Mus. Zool., Univ. Michigan, 39:56, February 15, 1938) arranged P. goldmani as a synonym of Peromyscus eremicus. ”

“ Allowing for fading, it seems to resemble ohionensis more in the lighter color of the anterior part of the median dorsal stripe, than it does either griseus or fisheri. We are also influenced in making this allocation by Bole and Moulthrop's (op. cit.:137) finding intergradation between T. s. ohionensis and T. s. striatus in a specimen obtained at New Harmony, Posey Co., Indiana.
Howell (Jour. Mamm., 13:166, August 9, 1932) referred two specimens from Boone County, Indiana, to T. s. fisheri. We have examined a specimen (5675 AMNH) from that place and think it is one of the two seen by Howell. ”

“ Three are young and one (126113 AMNH from Las Ventanas) is an adult female. The underparts of the young are washed with rufous as in S. h. saturatus. The adult lacks this rufous as do specimens of S. h. zanjonensis and some [Pg 370] specimens of S. h. saturatus. In the adult the color of the upper parts and size of the upper cheek-teeth are intermediate between the dark-backed, small-toothed S. h. saturatus and the paler-backed, large-toothed S. h. zanjonensis. The rostrum is intermediate in width but definitely nearer the broad condition which obtains in S. h. saturatus. ”

“ Michigan, 420:1, June 28, 1940) , on the basis of (1) more reddish color, (2) deeper zygomatic plate, (3) shorter jugal as expressed as a percentage of the length of the part of the zygomatic arch anterior to the jugal, and (4) larger area of inner face of jugal exposed when skull is viewed from directly above. Possibly it is noteworthy that the specimens from Las Animas are larger than Hooper's holotype and one topotype; this larger size is indicative of intergradation with G. b. lutescens as represented by the specimens examined by us from Pueblo.
Our examination of an adult female, No. ”