180 REPTILES. 



19. CHAM.ELEOPSIS. Nape iiot crcsted. Throat-pouch simple. 



■\^ Occiput convex. Throat with a cross fold behind. 



20. Enyalius. Tail round, not crested. Toes all simple. 



21. Ophryoessa. Tail compressed. Hinder toes slightly ser- 

 rated on the outer edge. 



C. Nostril superior, above the eye-ridge, subapical. Toes dilated 

 under the last joint but one, very unequal and united together at 

 the base. Throat-pouch distinct, largely dilatable. Femoral 

 pores none. Head subshielded. Interparietal distinct. 



a. Scales of the belly granular. 



22. Cham^leolis. Back and tail with a bony crest. Toes di- 

 lated. 



b. Scales of the belly imbricate, flat. 



23. XiPHOSuRus. Toes dilated. Tail with a bony crest. 



24. Dactyloa. Toes dilated. Back and tail with a crest of com- 

 pressed scales. 



25. Ehinosaurus. Toes dilated. Back with a slight fold formed 

 of 2 series of small scales. Kostral plate horizontal. Nose 

 produced. 



26. Anolius. Toes dilated. Back simple, or with a slight 

 crest formed of 2 series of small scales. Rostral erect. Nose 

 rounded. 



27. AcANTHOLis. Toes dilated. Back simple, with scattered 

 tubercles. 



28. Draconura. Toes scarcely dilated. Back simple. Tail 

 round. 



29. NoROPS. Toes slender, not dilated. Back simple. Tail 

 round. 



II. Body subtriyonal or depressed. Terrestrial. 



D. Body subtrigonal, covered with large generally keeled scales, di- 

 rected obliquely towards the back. Head generally shielded. 

 Superciliary and interparietal shields distinct. Throat smooth, 

 or with a cross fold behind. Toes simple. 



a. Caudal and dorsal scales similar. 



* Femoral pores distinct. Inteiparietal plate large. 



30. Tropidolepis. Back not crested. Throat with a fold on 

 each side. Nostril superior, subapical. 



