G. CAIMAX. 20*') 



Jacare latirostris, part., Gray, 11. cc. 



• hirticolliis, Gray, U. cc. pp. UiO, 27. 



Allip-ator ( Jacare) chia]iasius, Bocourt, Jourji. de Zool. v. ]). 400 

 (1876) ; Sumuhrast, Bull. Hoc. Zool. France, 1880, p. 170. 



10 or 20 upper and 18 to 20 lower teetli on each side; fourth 

 maxillary tootli much larger than third, in the adult. Head oiiee 

 and a half to twice as long as broad ; snout more or less obtuse, 

 its basal width less than its length ; a strong ridge from one anterior 

 border of the orbit to the other, sometimes j)roduccd anteriorly 

 towards the fourth maxillary tooth ; orbit not produced anteriorly ; 

 interorbital space concave ; upper eyelid rugose or tubercular, often 

 more or less produced into a small horn, with a small bony plate 

 anteriorly ; su])ratemp()ral fossa? present. Two or tbree more or 

 less regular transverse series of small postoccipital scutes ; foiir or 

 five transverse series of large nnchals, all articulated together, usually 

 two or three of which are com])Oscd of four scutes. Dorsal sliield 

 composed of 18 or 19 transverse series of scutes, the broadest of 

 which contain >> or 10 scutes ; those of the median series very 

 obtusely keeled in the adult. Bony ventral shichl much developed ; 

 the scutes of the outer rows obtusely keeled. All the scutes of the 

 body, limbs, and tail bony in the adult. Fingers free, toes webbed 

 at the base. Adult uniform blackish ; young pale olive, dotted and 

 spotted, or cross-barred, with brown or black. 



The largest specimen in the Collection measures 2 m. GO centim. 



Central and South America, from the isthmus of Tehiiantepec to 

 the Kio de la Plata. 



a, h, c. Hgr. & vg., Tonala Valley, Chiapas. F. Sumichrast [C.]. 

 stflFd. ' ■ 



d. Yg., stffd. Tapana, Tehuantepec. F. Sumichrast [C.]. 



e. Hgr., sttfd. Huaniuchal, Guatemala. C). Salvin, Esq. [P.j. 



/. Yg., spir. Denierara. W. Carruthers, Esq. [P ]. 



^. Yg..spir. Demerara. 



/(, /, k. Hgr. & vg., Demerara. 



stlf.l. 



/. Yg., spir. Surinam. 



«?, n. Hgr. & yg., Surinam. 



skins. 



0. Ad., stffd. Brazil. 



p. Yg., spir. Brazil. 



q. Ad., stffd. Paraguay. T. J. Hutchi.son, Esq. 



[P.J. 



r. "ig., stffd. Sta. Cruz de la Sierra, (Tyi^e of J. ocella/a.) 



Bolivia. 



s. Ad., stffd. Argentine Republic. W. D. Cliristie, Esq. [P.]. 



/. Ad., stffd. Argentine Republic. 



n. Yg., stffd. ? (Type of /. lonyiscufafa.) 



V, w. HgT., stffd. ? 



.r. Hgr., skull. ? 



