70 CROCODILIA. 



26125. Part of the mandibular symphysis. Figured by Owen in 

 (Fig.) his ' Reptilia of the London Clay,' pt. ii. pi. x. fig. 1. 



26126. Fragment of a mandibular ramus. Figured by Owen, 

 (Fig.) op. cit. pi. x. fig. 2. 



26128. The slightly imperfect femur. Figured by Owen, op. cit. 

 (Fig.) pi. x. fig. 9. 



26129. The centrum of a. cervical vertebra. Figured by Owen, 

 (Fig.) op. cit. pi. x. fig. 8. 



Genus THORACOSAURUS, Leidy \ 



Nasals not reaching premaxillae ; a preorbital vacuity in the 

 cranium between the lachrymal and prefrontal ; the supratem- 

 poral fossae larger than the orbits ; and the facial profile straight. 



Thoracosaurus neocesariensis (De Kay 2 ). 



Syn. Gavialis neocesariensis, De Kay 3 . 

 Crocodilus clavirostris, Morton 4 . 

 Crocodilus basifissus, Owen 5 (teste Leidy). 

 Thoracosaurus grandis, Leidy 6 . 



The type species. Fully as large as Oaricdis gangeticus, with the 

 rostrum relatively wider, and no eversion of the orbit. 

 Hob. North America. 



41842. Cast of the cranium. The original, which is the type, 

 was obtained from the Cretaceous near Vincenttown, 

 Burlington County, New Jersey, and is preserved in the 

 Museum of the Academy of Sciences at Philadelphia ; it is 

 figured by Leidy in the ' Smiths. Contrib. Knowl.' vol. xiv. 

 art. 6, pi. i. figs. 1, 2, pi. ii. fig. 1 (1865). 



Purchased, 1869. 



1 Proc. Ac. Nat. Sci. Philad. vol. vi. p. 35 (1852— vol. dated 1854). 



2 Zool. New York, pt. iii. p. 28 (1842).— Gavialis. 



3 Loc. cit. 



4 Proc. Ac. Nat. Sci. Philad. vol. ii. p. 82 (1844— vol. dated 1846). . 



5 Quart. Journ. Geol. Soc. vol. v. p. 381 (1849). 



6 Loc. cit. 



