8 



Dlnosaiiria. 



Wall-case, 

 No. 2. 



Pelagosau- 

 rus. 



Wall-case, 

 No. 2. 



numerous, lai^ge, compressed, and sliglitl}' recurved teetli, and 

 the vertebra? are constricted and biconcave. It probably 

 attained a leng-th of ten or twelve feet. The 

 original specimens from Monheim. first 

 described and figured by Soemmerring in 

 1816, as a gigantic lizard (Lacerta gi- 

 gantea) are exhibited in the case. It is now- 

 known that Geosaurus is very closely allied 

 to, if not identical with Metriorhynclins, a 

 genus of Crocodiles remarkable for the 

 presence of a sclerotic ring in the eye and 

 the absence of bony scutes. Many species 

 of MefriorhyncJins arc found in the Jurassic 

 rocks of Europe and two nearly complete 

 skeletons of a form common in the Oxford 

 Clay of Petei'borough are mounted in Wall- 

 case No. 2. These specimens, as well as the 

 skeleton of Steiieosanrns placed near them, 

 Avere obtained by A. N. Leeds, Esq., P.G.S. 

 A reproduction of the entire skeleton 

 of the Pelagosanrus typus, from the Lias of 

 Curcy, Noi-mandy, prepai-ed by the late 

 Fig. 10.— ToothTf Daco- P^ofcssor E. Deslongschainps, is placed in 



.•<aurusmaxhin'^(,Pnen.) the same Wall-CaSC (No. 2). r' 



vimmen ge ay, y. Fvom. the Wealden of the South-east of 



England, the Purbeck beds of Dorset, we have a true Croco- 

 dilian, the Goniopliolis ; and a dAvarf species, Theriosuchus pusil- 

 Ins, Owen (Table-case No. 11). 



Wall-cases, 

 Nos. 1 and 2. 



Table cases, 

 Nos. 9 and 

 10. 





Wall-cases, 

 Nos. 3—7, 



Fig. 11. — Profile of skull of relar/osaiirns iypm (Bronn), from the Upper Lias of 

 Normandy (reduced). T, supra-temporal fossa ; 0, orbit. \ nat. size. 



A large Crocodile has been obtained from the Eocene Ter- 

 tiary of the Isle of Wight, and from Hordwell, Hampshire ; 

 and remains of many species of Crocodiles and Garials, from 

 the Tei'tiary rocks of India, may be seen in the Avall-case. 

 These are referable to the t3-pical genus CrococHlus, and also to 

 the other living genera, namely, Garialis of India and Tomis- 

 fovia of Borneo ; both the last-named genera being long- 

 snouted types. 



Order III.— DINOSAURIA. 



This I'emarkable group of huge terrestrial reptiles is quite 

 extinct. Some of them had bony dorsal plates and long and 



