106 SAURIANS. 



Aprasiadae, founded upon one species only — Aprasia pulchella, 

 which is limbless ; and the Py<jop)odid(E, comprising the two 

 genera Pygopus and Delma, the former containing two, the latter 

 only one ascertained species. The Gymnopthalmidce constitute still 

 another small family, quadrupedal, but with the limbs small and 

 weak. Of seven genera referred to it, five are Australian, one is 

 European, and one belongs to South America. Ablepharus panno- 

 rdcus is a small Lizard of this family, inhabiting Eastern Europe, 

 wath a congener, A. bivittatus, in the Caucasus ; and Gymno- 

 pthalmus lineatiis inhabits Brazil and the Island of Martinique. 



In the second tribe of Leptoglossa, entitled Cyclosaura, the 

 scales of the belly are square, in cross bands ; those of the back 

 and tail are rhombic and imbricate, or circular and subgranular ; 

 the tongue is lengthened, and more or less conspicuously furcate ; 

 and the eyes are diurnal, having two valvular lids. The limbs are 

 generally well developed ; but in several genera they still are more 

 or less rudimentary, or even absent. 



There are four small families in which the sides are rounded and 

 covered with scales like the back. Of these, that of Chamcesaurida. 

 is founded upon the South African Lacerta anguina of Linnoeus, now 

 CkamcBsaura anguina, which has the limbs quite rudimentary. In 

 the American families of Ccrcosaurid(e, ChirocoUdce, and Anadiadce, 

 the limbs are moderately developed, and have each five toes. The 

 two last-mentioned families are founded each ujoon a single species, 

 Chirocolus imbricatus and Anadia ocellata ; and the other contains 

 the two genera Circosaura and Lepisoma — of which the first com- 

 prises some two or three species only. All of these reptiles have 

 exceedingly long tails, though not so inordinately long as in the 

 Lacertidce of the genus Tachydromus. 



Certain other families have a distinct longitudinal fold, covered 

 with small granular scales on each side. These are the families 

 Chalcidce, Holaspidce, and the more extensive one of Zonuridce. 

 The Chalcidds have the head covered with regular many-sided 

 shields, and the lateral fold is indistinct ; limbs small and rudi- 

 mentary, and the hind feet are undivided in the genera Ckalcis and 

 Bachia, with three tubercles in place of toes in Microdactylus, and 

 with four clawed toes in Brachypus. Each of these genera is 

 founded on a single species, and all are doubtless peculiar to the 



