Geological Society. 257 



form. The inner is very much larger than the outer condyle, 

 and the valley between the two is sharply angulated. 



Compared with the Pterodactylian quadrates already dis- 

 covered by Mr. Mawson in the same formation and locality, 

 the new specimen is about three times as large, and differs 

 in the marked inequality of the articular condyles, as also in 

 their less oblique disposition. The new fossil, however, 

 agrees with the others in having these condyles remarkably 

 tumid and separated by a narrow sharp valley, thus re- 

 sembling the corresponding bones of the Jurassic * rather 

 than those of Cretaceous age f. So far as yet known, 

 indeed, the articular end of the quadrate in Cretaceous Ptero- 

 saurian genera is almost saddle-shaped, with acute lateral 

 borders. 



Not being able to determine the genus of the Brazilian 

 Cretaceous Pterodactyl, it is equally impossible to estimate 

 the size of the skull or the animal itself from a single bone. 

 There is too much variation in the proportions of the snout 

 and the relative dimensions of the head among Pterodactyls 

 to admit of any such induction. To judge by Marsh's figure 

 of the skull of Pteranodon, however, the Brazilian form must 

 have even exceeded in size the gigantic species of this North- 

 American genus, of which the head sometimes attains a 

 length of 4 feet. 



PROCEEDINGS OE LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



January 22, 1896.— Dr. Henry Woodward, F.R.S., 

 President, in the Chair. 



The following communications were read : — - 



1. ' On some Podophthalmous Crustaceans from the Cretaceous 

 Formation of Vancouver and Queen Charlotte Islands.' By Henry 

 Woodward, LL.D., F.R.S., P.G.S. 



This paper contains descriptions of several crustaceans from the 

 Cretaceous coal-bearing strata of Vancouver and Queen Charlotte 

 Islands, sent to the Author by J. F. Whiteaves, Esq., F.G.S., 



* R. Lydekker, " On certain Ornithosaurian and Dinosaurian Remains,'' 

 Quart. Journ. Geol. Soc. vol. xlvii. (1891), p. 41, pi. v. figs. 3, 4. 



t H. G. Seeley, 'The Ornitkosauria ' (1870), p. 90, pi. xi. figs. 16, 17. 

 See also figure of quadrate of Pterunodon (no description) by O. C. 

 Marsh, Amer. Journ. Sci. [3] vol. xxvii. (1884), pi. xv. 



Ann. & Mag. N. Hist. Ser. 6. Vol. xvii. 18 



