CROCODILUS SI AMEN SIS. 61 



The Crocodiles are found in America, Africa, Asia, and Australia. The following species 

 are found in British India : — 



* A series of anterior nuchal plates : Bombifrons, Gray, 



The width of the interorbital space is miicli less than the vertical dia- 

 meter of the orbit C. palusiris, p. Gl. 



The width of the interorbital space is nearly equal to the vertical dia- 

 meter of the orbit C. siametisis, li. 61. 



** Anterior nuchal plates none : Oopholis, Gray. 



Dorsal plates in six longitudinal series C. porosus, p. 62. 



Dorsal plates in four longitudinal series C. pondicerianus, p. 62. 



Crocodilus palustris. (Plate VIII. hg. A.) 



Crocodilus palustris, Less. inBelang. Voy. Ind. Orient., Zool., Rept. p. 305. G7-ay, Catal. Tort, ifc, 

 8vo, p. 63. 



ATilgaris, var. B, Dum. ^- Bibr. Erpet. gen. iii. p. 108. Cantor, Mai. Rept. p. 15. 



trigonops, Gray, Catal. Tort. 6fc., 8vo, p. 62. 



bombifrons, Gray, I. c. p. 59. Huxley, Proc. Linn. Soc. 1859, pp. 13, 28. 



biporcatus, Cautley, As. Research, xix. tab. 3. figs. 1 & 3 (not Cuv.). 



Bombifrons trigonops. Gray, Ann. ^ Mag. Nat. Hist. 1862, x. p. 269. 



The upper surface of the snout is covered with numerous small, rounded, irregular pro- 

 minences. Interorbital space deeply concave, its width being much less than the vertical 

 diameter of the orbit ; two pau's of strongly keeled anterior nuchal plates ; three pairs of 

 large posterior nuchal plates, each with an exceedingly strong keel — the plates of the outer 

 pair not much smaller than the middle plates. Six shields in each of the transverse rows 

 of the middle of the back ; sixteen transverse rows of dorsal shields ; each shield with a 

 strong keel. 



The British Museum possesses specimens from Madras, from Malabar, from Ceylon, and from 

 the Ganges ; it attains probably to the same size as Croc, porosus. The figure on Plate VIII. 

 is taken from a Madras specimen, and represents the head of half its natural size. 



Crocodilus si.mhensis. (Plate VIII. fig. B.) 



Crocodilus siamensis, Schneid. Hist. Amph. p. 157. 



galeatus, Cuv. Ann. Mus. Hist. Nat. x. p. 51. pi. 1. fig. 9 (skull of an adult). 



Bombifi-ons siamensis. Gray, Ann. ^ Mag. Nat. Hist. 1862, x. p. 269. 



The upper surface of the snout without prominences, and almost smooth. Interorbital 

 space moderately concave, its width being nearly equal to the vertical diameter of the orbit ; 

 two pairs of strongly keeled anterior nuchal plates ; two pairs of large posterior nuchal 

 plates, each with an exceedingly strong keel. Four or six shields in each transverse row on 

 the back ; sixteen transverse rows of dorsal shields ; each shield with a strong keel. 



