i). AI.LiaATUK. — 0. CAIMAX. 291 



on the middle of tlio body. Each ventral shield with a thin os-sifica- 

 tiou. Fingers free. End of tail little serrate above, scarcely com- 

 pressed. Colour dark brown, with vertical yellow bars on the sides 

 and tail, the former very irregular; chin, (luoat, and lips yellow, 

 without spots. 



Total lengtli I metre 30 centim. 



1^1 ah. 



•> 



'^. Alligator sinensis. 



Alligator sinensis, Fauvel, Joura. X. (Jhina Br. A^. S<>c. xiii. p. I, 

 pi. — (187!)) ; Vaillant, Ann. Sc. Nat. (0) ix. art. 8 (I88U) ; lioett- 

 yer, Ber. Offtnb. Ver. Xaturk. 1888, p. 111. 



17 or 18 upper and 18 or 19 lower teeth on each side. Head 

 nearly once and a half as long as broad ; lateral outlines of snout 

 converging towards the end, which is obtusely rounded; upper eye- 

 lid entirely bony. Three pairs of large nuchal scutes, in contact 

 on the median line ; two small, round, isolated scutes in front of 

 the large nuchals, and between them and the skull a semicircular 

 row of six conical shields. 17 transverse series of dorsal scutes, the 

 broadest of which are composed of six scutes. Ventrals with a thin 

 ossification. Fingers free, toes half-webbed. Tail stronglv com- 

 pressed and crested posteriorly. Greenish black above, speckled and 

 vermiculate with yellow; underparts greyish. 



Total lengtli 1 metre 74 centim. 



Yang-tse-Kiang. 



6. CAIMAN. 



AUigator. part., Cuvier, Arm. Mus. x. p. 30 (1807); Uiim.^- Bibr. iii. 



p. 63 (1836) : Strnuch, Syn. Crocod. p. 9 (1866). 

 t^aiman, Spi.i; Lacert. Bras. p. 3 (182")); Gray, Cat. Turt. ^-c. p. 66 



( 1844); Huxley, Ji>urn. Linn. Soc. iv. p. 3 (1860) ; Gray, Cat. Sh. 



Rept. ii. p. 27 (L^72). 

 Jacaretiuga, Spix, I. r. p. 1. 



Champsa, part., Wayler, Syst. Amph.^^. 140 (18.">0). 

 Jacare, Gray, Cat. Tort. p. 64 ; Huxley, I. c. p. 4 ; Gray, Cat. Sh. 



Rept. ii. p. 2;"). 

 Melanosuchus, Gray, Ann. ^- May. X. H. C',) x. p. 328 (1862). 

 ( 'ynosuchus. Gray, I. c, 

 Paleosuchus, Gray, I. c. p. 330. 

 Ai'omosuchus, Gray, I. c. 



18 to 20 upper and 17 to 22 lower teeth on each side ; fourth 

 maxiUary tooth longest; fourth mandibular tooth fitting into a pit 

 in the upper jaw. Snout moderately long, or short : no bony nasal 

 septum ; nasal bones extending to the nasal aperture : supra temporal 

 fosste very small or absent. Splenial bones not entering the man- 

 dibular symphysis, which extends to the fourth or fifth tooth. A 

 dorsal shield formed of six or more longitudinal series of articulated, 

 keeled, bony scutes ; a ventral armour of overlapping bony scutes, 

 each scute formed of two distinct portions united by suture. 



Central and South America. 



X 



