LIZARDS. 261 



32. Megalochilus, Eichivald. PhrynocepLalus, part, Kawp. 

 Gecko, part, Latr. Agama, part. Baud. 



Head depressed, rounded. The angle of the mouth fringed 

 with a large toothed membrane. Nostrils oblique, on the edge of 

 the face-ridge. Tongue entire, triangular. Ears hidden under 

 the skin. Neck contracted, with a cross fold beneath. Body de- 

 pressed, broad. Back not crested. The tail much depressed (its 

 whole length), covered with small scales. The toes elongate, very 

 strongly toothed on the edge. Femoral and preanal pores none. 



The Eared Megalochile. Megalochilus auritus, Eichw. 

 Fauna Casp. Cauc. 88, t. 14, /. 1,2. Lacerta mystacea, aut L. 

 aurita, Pallas, Voy. Russ. viii. 84, t. 100, /. 1. Gmelin, S, N. i. 

 1073. Latr. Rept. ii. 61. Licht. Kaup, his. Baud. Kept. iii. 429, 

 t. 45,/. 2. L. lobata, ShaWy Zool. iii. 244. Agama mystacea, 

 Merrem, Tent. 53. 



Grey, 

 a, h. Adult and half grown. Russia. Presented by J. E. Gray, 



Esq. 



*** Femoral pores distinct. Ear exposed. Scales of the back small, 

 granular, of tail ringed. Back not crested. Uromasticina. 



33. Uromastix, Merrem. Mastigura, Flem. Sphserodon, Gray P 



Head flat, triangular. Muzzle short, arched. Nostrils late- 

 ral. Ear oblong, vertical, toothed in front. Skin of the throat 

 plaited, partly covering the ears. Body oblong, depressed, not 

 crested, covered with small smooth scales. Tail rather depressed, 

 with rings of large keeled spinose scales above and below. Fe- 

 moral and preanal pores distinct. 



a. The loiuer caudal spines as large as the upper, ivithout any 

 alternating plates. Uromastix. 



The Eyed Uromastyx. Uromastix omatus, Ruppell, Zool. 

 N. Afr. i. t. I. Gray, Griffith, A. K. ix. 61. Schinz. Rept. t. 21, 

 /. 3. Dum. et Bib. E. G. iv. 538. U. ocellatus, Licht. 



Green, vermiculated with brown, and with waved cross bands, 

 formed of yellow spots ; the spines and scales of the thighs crowd- 

 ed, some of the scales of the pubic region thick and greasy ; fe- 

 moral pores 9-9 or 10-10. 



a, b. Half grown and young, in spirits. N. Africa, Egypt. Pre- 

 sented by J. Burton, jun. Esq. 



b. The lower caudal plates small, oblong, in 2 or 4 series in each 



ring. Mastigura. 



The Egyptian Mastigure. Uromastix spinipes, Merrem, 

 Tent. 56. Stellio spinipes, Daud. Rept. iv. 31. /. Geoff. Rept. 



