Samuel Joseph Mackie

“ We shall be obliged, by communications, and stratigraphical lists of fossils from our readers and correspondents, to assist us in our labours in determining this interesting point of Whether the ordinary division into "white chalk with flints," and "white chalk without flints," is not merely a mineralogical division, and not a proper geological subdivision characterized by distinctive organic remains, and marking out a positive zone in the succession of geological events and of life-forms ”

“ The very knowledge of their existence will stimulate other observers to seek for more illustrative examples. What one is defective in, another may possess, and so from one to the other we may gain a general knowledge of the whole organism long before any perfect specimen has been brought to light. ”

“ The turtles of the Wealden have never been properly collected, and it is with a view to inducing some one to take up the search for them and their comparison with these Upper Greensand fragments, that we have published this note; for to the Wealden lands a priori, it is that we should be inclined to turn for the shores on which these ancient turtles lived, and from which their concreted remains were probably washed down by the tides and currents into the lower depths of the Wealden sea, where some portions of the Upper Greensand were contemporaneously being deposited. ”

“ Thus it will be desirable in searching for further specimens to look carefully for, and to preserve any fragments of real wood or black charcoal, however small, which may be attached to the inside or outside of the ochreous film, as in these fragments we might get some traces of structure to aid us. ”

“ Numerous kinds of shells are common in these nodules, as are bones of pterodactyles and other reptiles. Our attention has lately been drawn to very numerous fragmentary remains of turtles, consisting chiefly of the crania and lower jaws, with numerous fragments of the carapace, ribs, and many vertebræ. ”