— eS Ol 
25 
remains of a large species of Pterodactylus. The bones consist of — 
“1. The fore part of the head as far as about the middle of the 
cavitas narium, with a corresponding portion of the under jaws, 
many of the teeth remaining in their sockets. 
**2. A fragment of the bone of the same animal, apparently a part 
of the coracoid. 
“3. A portion of what appears to be one of the bones of the auri- 
cular digit, from a chalk-pit at Halling. 
“4. A portion of a similar bone, from the same locality as No. 1. 
“5. The head of a long bone, probably the tibia, belonging to the 
same animal as the head, No. 1. 
“6, A more perfect bone of the same description, not from the 
same animal, but found at Halling.” 
In a subsequent communication, dated December 1845, Mr. Bower- 
bank states with regard to the specimens Nos. 5 and 6, which he 
supposed to be parts of a tibia, that “on a more careful comparison 
with the figures of Pterodactylus by Goldfuss, I am inclined to be- 
lieve they are more likely to be portions of the ulna.” 
With respect to the long bone, No. 6 in the above list, comparing 
it with that figured in the Geol. Trans., 2nd Series, vol. vi. pl. 39. 
fig. 1, and referred by me to Cimoliornis diomedeus, Mr. Bowerbank 
writes :— 
“Although the two specimens differ greatly in size, there is so 
strong a resemblance between them in the form and regularity of the 
shaft, and in the comparative substance of the bony structure, as to 
render it exceedingly probable that they belong to the same class of 
animals ;’” and he concludes by remarking, that “If the part of the 
head in my possession (see fig. 1) be supposed similar in its propor- 
tions to that of Pterodactylus crassirostris,—and there appears but 
little difference in that respect,—it would indicate an animal of com- 
paratively enormous size. The length of the head, from the tip of 
the nose to the basal extremity of the skull, of Pt. crassirostris is 
about 4 inches, while my specimen would be, as nearly as can be 
estimated, 9} inches. According to the restoration of the animal by 
Goldfuss, P¢. crassirostris would measure as nearly as possible three 
feet from tip to tip of the wings, and it is probable that the species 
now described would measure at least six feet from one extremity of 
the expanded wings to the other; but if it should hereafter prove 
that the bone described and figured by Prof. Owen belongs to a Pte- 
rodactyle, the probable expansion of the wings would reach to at least 
eight or nine feet. Under these circumstances I propose that the spe- 
cies described above shall be designated Pterodactylus giganteus.” 
(Quarterly Geol. Journ. vol. ii. p. 8.) 
In a subsequent memoir, read June 9, 184 7, and published in the 
‘ Quarterly Journal of the Geological Society,’ vol. iv. February 1848, 
Mr. Bowerbank gives figures of the ‘bone-cells’ from the jaw of a 
Upper Chalk,” in the ‘Annals of Natural History,’ vol. xx. p. 295, affirms that no 
upper chalk exists in the localities whence the above-defined specimens came. 
They are from the “ Middle Chalk.” 
