40 
NATURAL HISTORY. 
£upper FLOOR. 
wards and forwards with the same facility,—hence their 
*name. They are generally destitute of limbs ; but the 
genus Chirotes is peculiar for having two small rudi¬ 
mentary front legs. Most of them have teeth placed on 
the inner edges of the jaw, but the Trogonophid.es have 
them placed on the edge. They all live in ant-nests, and 
feed on those insects. 
The following Table exhibits the arrangement of this 
Class at one view; the numbers refer to the Cases. 
Class III. Calrita, Gray . 
Reptilia. Algira, Cuvier. 
Psammodromus. 
Sect. 1. Squamata. Ophiops, Menetries. 
Order I. Sauria. Calosaura, Bum. 
A. Leptoglossce. 
Fam. 1. Monitoridce. 3. 
Psammosaurus, Fitz. 
Monitor, Baud. 
Polydedalus, Wagler. 
Empagusia, Gray. 
Hydrosaurus, Wagler. 
Fam. 2. Helodermida. 
Heloderma, Weigm . 
Fam. 3. Teidce. 3. 
Teius, Merrem. 
Ctenodon, Wagler. 
Acrantus, Wagler . 
Ameiva, Cuvier. 
Aporomera, Bum. 
Cremidophorus, Wagl. 
Dicrodon, Bum. 
Centropyx. 
Ada, Gray. 
Crocodilurus, Spur. 
Custa, Flem. 
Fam. 5. Zonuridce. 3. 
a. Zonurus, Merrem. 
Tribolonotus, Bum. 
Cicigna, Gray. 
Tetradactylus, Me r r. 
T ackydromus, Ba ud. 
Caitia, Gray. 
Abronia, Gray. 
b. Gerrkonotus, 
Weigm. 
Barisia, Gray. 
Elgaria, Gray. 
Pseudopus. 
Opkisaurus. 
Fam. 6. Cercosauridce. 
Cercosaurus. 
Fam. 7* Chirocolid^s. 
Heterodactylus, Spix. 
Fam. 8. Chamcesauridve. 
Ckamaesaura. 5. 
Fam. 9. Chalcidcs. 
Fam 4. Lacertinidce. 
Zootoca, Wagler. 
Lacerta, Linn. 
Teira, Gray. 
Eremias, Fitz. 
Acantkodactylus, 
Bum. 
Scapteira, Fitz. 
Meroles, Gray. 
Mesulina, Gray . 
3 . Chalcides. 
Microdactylus, Tscku. 
Colobus, Merrem. 
Ecpleopus, Bum. 
Pentadactylus, Bum. 
Leposoma, Spix. 
Fam. 10. ScincidcB. 5. 
o. Scincus, Fitz. 
Sphenops, Wagler. 
b. Celestus, Gray. 
Trackysaurus, 
Gray. 
Tropidopkorus, 
Bum. 
Egernia, Gray. 
Tiliqua, Gray. 
Ampniglossa, Bum . 
Euprepes, Weigm. 
Euneces, Weigm . 
Leiolopisma, Bum. 
Psammita, Coct. 
Cyclodus, Wagler. 
Adaria, Gray, w 
Aprasia, Gray. 
Herinea, G'ay. 
c. Riopa, Gray. 
Lvgosoma, Gray. 
Ckiamela, Gray. 
Tetradactylus, 
Lacep. 
Seps, Linn. 
Siaphos, Gray. 
Heteromeles, Bum. 
Chelomeles, Bum. 
Brackymeles, Bum , 
d. Ophiodes. 
e. Anguis, Linn. 
Ophiomorus. 
Siguana, Gray. 
Stenostoma. 
Dorfia, Gray. 
Fam. 11. Gymnoph - 
thalmidce. 5. 
Microlepis. 
Ablepharis. 
Gymnophthalmus. 
Cryptoblepkaris. 
Lerista, Bell. 
