62 SAURIA. 



This species was first described from a skull, sent by French Missionaries from Siam to 

 the Paris Museum ; but the first entire animal appears to have been brought to Europe by 

 the late M. Mouhot, who procured it in Gamboja. Adult animals of 10 feet in length show 

 a longitudinal prominence in the middle, behind the posterior angles of the orbit. Our 

 specimen, being only 4^ feet long, has this prominence slightly, but distinctly, indicated ; 

 we have figured its head of half its natural size. 



CrOCODILUS i'OROSUS. 



Crocodilus porosus, Schneid. Amph. p. 159. Cantor, Mai. Rept. p. 16. Jerd. Journ. As. Soe. Btng. 



xxii. p. 466. 

 biporcatusj Cuv. Oss. Foss. v. pt. 2. p. 65. tab. 1. figs. 4, 18, 19 (young skulls), & tab. 2. fig. 8. 



Mull. ^ Schleg. Krokod. Ind. Archipel. tab. 3. fig. 6 (midcUe-aged skull), fig. 7 (aged). 

 Oopholis porosus. Gray, Ann. ^ Mag. Nat. Hist. 1862, x. p. 267. 



Anterior nuchal plates none, or only a pair of very small ones. Dorsal shields in six 

 longitudinal series ; generally another rudimentary series on each side of the middle of the 

 back, so that there are eight shields in a part of the transverse series ; each shield with a 

 keel. Dorsal shields in seventeen* transverse series (to the root of the tail). 



This is a very common species along all the rivers of the East Indian continent and 

 Archipelago. The specimens found in Australia scarcely differ from those from the East 

 Indies. It grows to the very large size of 30 feet, and specimens from 15-20 feet are by no 

 means rare. 



Crocodilus pondiceeiands. (Plate VII.) 



Oopholis pondiclierianus, Gray, Ann. ^ Mag. Nat, Hist. 1862, x. p. 268. 



Anterior nuchal plates none. Dorsal shields in four longitudinal series ; another rudi- 

 mentary series on each side of the middle of the back ; each shield with a keel. Dorsal 

 shields in seventeen transverse series. Fore toes half webbed ; the two outer of the hind 

 toes completely webbed. 



Only one specimen is known of this species; it is quite young, 12 inches long, and is said 

 to have been brought from Pondicherry. 



* Australian specimens have only sixteen transverse series. 



