322 S A U R I A. 



The throat itself is generally blackish. The abdomen, the limbs, and 

 tail beneath, are yellowish, unicolor, except in the male sex, in which 

 the under surface of the thigh exhibits an elongated, black area, the 

 result of crowded, small spots, one of which may be seen upon each 

 scale. 



Loc. — Kio de Janeiro, Brazil. 



Genus SACCODEmA, Girard. 



Char. gen. — Scutis cephalicis minorihus, multicarinatis. Naribus late- 

 ralihus, super porcam. supraciliarem sitis. Squamis temporalibus 

 carinatis et imhricatis. Auriuyn margine anteriore dentlculato. CoIIo 

 a lateribus perulis munito, et squamis parvulis cooperto; perulis 

 intra granvilatis. Plicatara scapulari vei^tico-ohliqua. jSquamis 

 dorsualibus modicis, conspicue carinatis, acuminatis ; serie dorsuali 

 mediana, cristae humili similitudinem praehente: ahdominalihus laevi- 

 hus et integ^'is. Paris femoralihus et praeanalihus nidlis. Cauda 

 ampla, ad hasim compjressa, postice minuente. Digitis palmarum 

 plantarumque gracilihus, inaequalihus. 



Gen. Char. — Cephalic plates rather small, multicarinated. Nostrils 

 lateral, placed immediately above the supraciliary crest. Temporal 

 scales carinated and imbricated. Auricular aperture denticulated 

 in front. Sides of the neck pouched, covered with small scales 

 and granules within the pouches. A vertico-oblique fold in advance 

 of the shoulder. Dorsal scales moderate, conspicuously carinated, 

 acuminated ; central dorsal series simulating a low crest. Abdo- 

 minal scales smooth and entire. Femoral and preanal pores none. 

 Tail broad at the base, compressed, and tapering posteriorly. Fingers 

 and toes slender, unequal. 



Syn. — Saccodeira, Grd. in Proc. Acad. Nat. Sci. Philad. November, 1857. 



Observ. — The relationships of this genus are with Microloplms, 

 Holotropis, or LeiocephaJus, and Proctotretus, and its congeners. It has 

 neither femoral nor preanal pores, and the middle dorsal series of 

 scales exhibits an inconspicuous crest or ridge, formed by somewhat 

 more- developed keels than those of the adjoining series. By its cari- 

 nated cephalic plates and dorsal crest it approximates P-octotretus 

 proper, binding the Steirolepids to the Heterotropids. 



