LIZARDS. 227 



smooth, without any dorsal and caudal crest. Tail elongate, flat, 

 thick at the base, attenuated, covered with small, square, smooth, 

 whorled scales. Limbs strong. Toes very long, slender. Claws 

 slender. Femoral pores in a long series. 



The Callisaurus. Callisaurus draconoides, Blainv. N. Ann. 

 Mus. iv. t. 24,/. 2. Dum. et Bib. E. G. iv. 326. 

 Grey, with irregular brownish bands. 

 Inhab. California. Mus. Paris. 



50. Tropidogaster, Dum. et Bib. 



Head short, triangular, blunt in front, covered with keeled 

 scales, with a moderate interparietal shield, and many small keel- 

 ed supraocular scales. Nostrils lateral, tubular. Palate toothless. 

 Throat with 2 or 3 entire cross folds. Neck with 1 or 2 longitu- 

 dinal plaits on each side. Front edge of ear denticulated. Body 

 rather depressed, with a fold of skin on each side. Scales of the 

 back small, I -keeled ; of the belly 3-keeled. Back with a slight 

 toothed crest. Tail long, rather conical, slightly depressed at the 

 base, covered with whorled keeled scales, and slightly crested 

 above. Toes and claws slender, very small. Femoral pores none. 



The Tropidogaster. Tropidogaster Blainvillii, Dum. et Bib. 

 E. G. iv. 330, t. 39*,/. 2. Agama undulata, Mus. Paris. 



Fulvous, waved with black, and with a grey band on each side. 

 Inhab. . Mus. Paris. 



c. Scales of body and tail unequal. Sides serrated. Body 

 depressed. Femoral pores distinct. 



51. Phrynosoma, Weigmann. Tapayea, part, Cmv., i^i^r. 



Head short, rounded in front, with large spines on the sides 

 behind, and equal many-sided head-shields, interparietal shield 

 small, circular. Palate toothless. Throat folded across. Ears 

 simple-edged. Body short, very much depressed, oval. Scales 

 of the upper part keeled, with scattered spinose tubercles. Sides 

 granular, fringed above, and sometimes below, by a series of com- 

 pressed elongate scales. Back and tail not crested. Tail short, 

 tapering, depressed at the base. Limbs short. Toes short, tooth- 

 ed on the edge. Thigh with a series of pores. 



* Head tubercular. Belly without any lateral spines. Ventral 

 scales smooth. Femoral pores numerous, in 2 arched series. 



Douglas's Phrynosoma. Phrynosoma Douglasii, Gray^ 

 Griffith, A. K. ix. 44. Zool. Beechey^s Voy. t. Agama Doug- 



lasii, BelU Linn. Trans, xi. 105, t. 10. P. orbiculare, jun. Dum. 

 et Bib. E. G. iv. 323. 



