lOr, SAUEIAXS. 



Aprasiadcs, founded upon one species onlY—Aprasia, pulcheUa, 

 wliich is limbless ; and the Pijgopodida, comprising the two 

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

 only one ascertained species. The Gymnopthahnidai constitute still 

 another small famil)^ quadrupedal, but with the limbs small and 

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

 European, and ono belongs to South America. Abhpharus panno- 

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

 with a congener, A. bkittatus, in the Caucasus ; and Gymno- 

 pfJialmus Hneatus inhabits Brazil and the Island of ^Martinic^ue. 



In the second tribe of Leptoylossa, entitled Cyciosaura, 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 ej^es 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 wliich the sides are rounded and 

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

 is founded upon the South African Lacerta aixjuina of Linnajus, now 

 ChanKSsaura anguina, which has the limbs quite rudimentary'. In 

 the American families of Cercosauridce, CldrocoUdce, and Anadladce, 

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

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

 Cfiirocoliis imbricatus and Anadia ocellata ; and the other contains 

 the two genera Circosaiira 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 Tcudiydromiisi. 



Certain other families have a distinct longitudinal fold, covered 

 with small granula.r scales on each side. These are the families 

 (jlialcid.m, Ilolaspidxe, and the more extensive one of Zoxuridce. 

 The Chalcidce 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 C/iciIcis and 

 Backia, with three tubercles in place of toes in Mk-rodadylns, and 

 with four clawed toes in Brachypus. Each of these n-enera is 

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



