LIZARDS. 181 



** Femoral pores none. Anal pores distinct, marginal. Back and 

 tail not crested. Inteiparietal plate small. 



31. Leiodera. Nostril lateral on the face-ridge. Scales of the 

 sides of the neck and back large, rhombic. Sides simple. 



32. Leiol^mus. Nostril lateral on the face-ridge. Scales of the 

 sides of neck granular, of back rhombic. Sides simple. 



33. Ptydogerus. Nostril lateral on the face-ridffe. Scales of 

 the neck granular, of back rhombic. Sides with a crest of 

 keeled scales. 



34. Proctotrepus. Nostril above the face-ridge. Scales of the 

 neck granular, of back rhombic, small. Sides simple. 



*** Femoral and anal pores none. 



\ Interparietal plate linear small. Head-shields rather regular. 



35. Leiocephalus. Back and tail crested. Scales of throat, 

 back and tail rhombic, moderate, 



36. Stenocerus. Back and tail lowly crested. Scales of back 

 rhombic, of the tail large, spinose. 



37. TRACHYCYCLrs. Back and tail not crested. Scales of back 

 rhombic, of tail large, spinose. 



W Interparietal plate large. Back or tail crested. 



38. Taraguira. Back not crested. Scales of back small, of the 

 throat granular. Tail round, with a slight crest and moderate 

 scales. Ear toothed in front. 



39. Microlophus. Back and tail lowly crested. Scales of the 

 back unequal, small. Tail with moderate scales. The ear 

 toothed in front. 



40. Oplurus. Nape with a small crest. Scales of back large, 

 of the sides small. Tail round, with rings of large spinose 

 scales. 



41. Strobilurus. Nape, back and tail slightly crested. Scales 

 of back moderate. Tail with rings of large spinose scales. 



42. Uraniscodon. Nape and back lowly crested. Scales of the 

 back large, rhombic. Sides of body and throat simple. Tail 

 round, slender, with moderate scales, slightly keeled above. 



43. Plica. Nape and back lowly crested. Scales of the back 

 small. Sides with 2 folds. The throat with groups of spines. 

 Tail round, slender, keeled above, with moderate scales. 



R 



