96 CKOCODILIA. 



the present genus, while Gnathosaurus, from the same deposits, may 

 perhaps be also included. Bhacheosaurus, which was founded upon 

 vertebras from the last-named formation, was identified by D' Alton 

 and Burmeister l with JEolodon, but from its larger size it is more 

 probable that it may have belonged to the present genus. Croco- 

 dilcemus was identified by Deslongchamps provisionally with 2Eo- 

 lodon, from which it differs in the character of the teeth and 

 armour. 



Metriorhynchus superciliosus, Deslongchamps 2 {ex 

 Blainville, MS.). 



Syn. Crocodilus superciliosus, Blainville (MS.). 

 Teleosaurus superciliosus, Deslongchamps 3 . 



Of medium size, with the nasals not reaching the premaxillaB ; 

 the prefrontals large and very convex externally; the frontals 

 strongly pitted posteriorly. 



This species must apparently be regarded as the type of the genus, 

 since it was on fragments of its skull joined to those of other genera 

 and species that Cuvier founded both his ' Gavial a museau allonge ' 

 and ' Gavial a museau plus court d'Honfluer ' 4 ; the latter being the 

 Steneosaurus rostro-minor of authors, to which Meyer applied the 

 generic name Metriorhynchus with the affix geoffroyi 5 . 



32617. The imperfect hinder portion of the cranium, showing the 

 occipito-parietal region and the hinder part of the frontals ; 

 from the Oxford Clay (Middle Jurassic) of Yaches-Noires 

 (Calvados), Prance. It agrees exactly with the corre- 

 sponding portion of the type cranium figured by Deslong- 

 champs in his ' Notes Paleontologiques,' pi. xx. fig. 2 a. 



Tesson Collection. Purchased, 1857. 



32614. Fragment of the anterior portion of the cranial rostrum, 

 showing four dental alveoli on either side, and one re- 

 placing tooth in situ ; from Vaches-Noires. 



Same history. 



32616. The imperfect frontal ; from Vaches-Noires. Same history. 



1 Der fossile Gavial von Boll, p. 77 (1854). 



2 Bull. Soc. Linn. Normandie, ser. 2, vol. i. p. 149 (1867). — Teleosaurus. 



3 Loc. cit. 



4 See Deslongchamps, ' Notes Paleontologiques,' p. 309. 



5 The writer thinks it might have been advisable to retain this name. 



