LIZARDS. O 



b. Eyes distinct^ eyelids distinct, connivent. Head conical. 



15. SciNciD^. Rostral shield moderate, triangular. Nostrils in 

 a plate between the frontal and labial shields. 



16. Ophiomorid^. Rostral moderate, triangular. Nostrils in 

 a notch on edge of nasal and the supernasal shields. 



17. SEPsiDiE. Rostral rather large, square. Nostrils in a notch 

 in the hinder edge of the rostral. 



18. AcoNTiAD^. Rostral large, cuplike. Nostrils in the rostral, 

 with a narrow slit to its hinder edge. 



c. Byes hidden under the skin. 



19. Typhlinid^. Head conical. Rostral shield cuplike. Nos- 

 trils in the rostral shield, with a slit to its hinder edge. 



20. Typhlopsid^. Head short, depressed. Rostral shield elon- 

 gated, extended up the forehead. Nostrils in an elongated na- 

 sal shield. 



Suborder II. Pachygloss^. Tongue thick, convex, attached to the 



gullet at the base. 



Tribe III. Nyctisaura. Scales of the belly small, rhombic, imbri- 

 cated ; of the back and sides granular. Tongue thick, short, 

 convex, end slightly nicked. Eyes nocturnal; eyelids circular, 

 not connivent, pupil linear, erect. Feet for walking ; toes sub- 

 equal, scaly beneath, and generally dilated. 



21. Geckotid^. The Old and New World. 



Tribe IV. Strohilosaura. Scales of the belly small, rhombic, im- 

 bricate; of the back and sides imbricate. Tongue thick, short, 

 convex, end slightly nicked. Eyes diurnal, with valvular eye- 

 lids; pupil round. Feet for walking; toes unequal, compressed. 



22. Iguanid^. Teeth on the inner side of the jaw-bone. New 

 world. 



23. AcAMiDiE. Teeth on the edge of the jaw-bones. Old world 

 and Australasia. 



Tribe V. Dendrosaura. Scales of the belly, sides and back gra- 

 nular. Tongue elongate, subcylindricai, wormlike, very exser- 

 tile. Eyes globular, very mobile, with a small, central, round 

 opening. Toes equal, united into two opposing groups, 



2^1. Chameleonid^. Teeth on the edge of the jaw-bone. Old 

 world. 



b3 



