294 CROCODILID. 
ventral shield much less developed than in the other species, only 
the scutes on the sternal region imbricating ; the posterior abdo- 
minal region without any ossifications. Fingers free, outer toes 
webbed at the base. Adult uniform blackish; young olive and 
black, the latter colour usually predominating. 
The largest specimen in the Collection measures 2 m. 5 centim. 
South America east of the Andes, from the Amazon to the Rio 
de la Plata. 
a, 6, c, d. Ad. & her., srazil. 
stffd. 
e-g. Yg., spir. Pernambuco. Je PS Smithy sq ies. 
h, Ad., skel. (incomplete). Rio Grande do Dr. v. Ihering (C. |. 
Sul. 
a, k. Her., skulls. tio Grande do Dr. v. Ihering [C.}. 
Sul. 
i. Ad., stffd. Rio Paraguay. Co]. Perez de Lasala [P.]. 
m-—n. Yg., spir. Buenos Ayres. J. Wilks, Esq. [P.]. 
o. Yg., suffd. P 
5 
p: Her., skel. 
q. Hgr., skull. 
P 
3. Caiman sclerops. 
Crocodilus sclerops, Schneid. Hist. Amph. ii. p. 162 (1801); Cuv. 
Ann. Mus. x. p. 31, pls. i. & ii. (1807) ; Tiedem., Opp., §& Lb. Nat. 
Amph., p. 60, pl. v. (1817). 
caiman, Daud. Rept. 11. p. 599 (1802). 
yacare, Daud. 1. c. p. 407. 
Jacaretinga punctulatus, Spiv, Lacert. Bras. p. 2, pl. ii. (1825). 
Champsa sclerops, Wagl. Syst. Amph. pl. vii. figs. 1 & 42 (1880) ; 
Natterer, Ann. Wien. Mus. ii. p. 321, pl. xxiii. (1840). 
Alligator sclerops, part., Gray, Syn. Rept. p. 62 (1881). 
sclerops, Dum. § Bibr. iii. p. 79 (1836); Strauch, Syn. Crocod. 
pp. 21 & 76 (1866); Burmeister, Ann. Soc. Argent. ix. p. 245 
(1880). 
punctulatus, Dum. §& Bibr.t.c.p.91; Strauch, l. ce. pp. 24 & 79; 
Ginth. Biol. C.-Am., Rept. p. 21 (1885). 
Champsa vallifrons, Natterer, 1. c. p. 522, pl. xxiv. 
punctulata, Natterer, 1. c. p. 328, pl. xxv. 
Jacare sclerops, Gray, Cat. Tort. Sc. p. 64 (1844). 
punctulata, Gray, 1. c. p. 65, and Cat. Sh. Rept. ii. p. 26 
(1872). 
vallifrons, Gray, l. e. 
longiscutata, Gray, Ann. § Mag. N. H. (8) x. p. 328 (1862), 
and Tr. Zool. Soc. vi. p. 164, pl. xxxiv. (1867), and Cat. Sh. Rept. 
li. p. 26. 
See Gray, ll. cc. pp. 329, 164, pl. xxxiii., & p. 26. 
multiseutata, Gray, Tr. Zool. Soc. vi. p. 164, and Cat. Sh. 
Rept. i. p. 26 *. 
* T have been unable to trace the type specimen of J. mu/tiscutata;, and IT 
strongly suspect that, through some oversight, this supposed species was 
founded upon the very specimen which had previously seryed as the type of 
J. longiscutata, 
