GECKOjriD^. • 3 



Fam. 18. ScincidsB. Arches present ; premaxillary double ; body 

 with osteodermal plates as in the preceding. 



Fam. 19. Anelytropidse. Premaxillary single ; no arches ; no 

 osteodermal plates. 



Fam. 20. DibamidaB. Premaxillary double ; no interorbital sep- 

 tum ; no columella cranii ; no arches ; no osteodermal 

 plates. 



Suborder II. EHIPTOGLOSSA. 



Nasal bones not bounding nasal apertures ; pterygoid not reach- 

 ing quadrate. Clavicle absent, limbs well developed. Tongue 

 vermiform, projectile. 



Fam. 2] . ChamaeleontidaB. 



Suborder I. LACERTILIA VERA. 



Leptoglossi, Pachyglossi, Annulati, Wiegmann, Herp. Mex. 1834. 

 Cyclosaura, Geissosaura, Nyctisaura, Strobilosam*a, Gray, Cat. Liz. 



1845. 

 Amphisbaenia, Gray, Cat. Tort., Croc, Amph. 1842. 

 Amphisbcenoidea, Kionocrania, Stannius, Zoot. AmpJi. 1856. 

 Acrodonta Pachyglossa, Nyctisaura, Pleiu-odonta, Ophiosauri, Cope, 



Pi-oc. Acad. P'hilad. 1864. 

 Amphisbaenoidea, Cionocrania, Nyctisaura, GUnther, Phil. Trans. 



clviii. 1807. 

 Pachyglossa, Nyctisaura, Pleurodonta, Ophiosauri, Cope, Proc. Amer. 



Assoc. Adv. Sc. xix. 1871. 

 LacertiUa vera, Boulenger, Ann. (§- Mag. N. H. (5) xiv. 1884. 



Fam. I. GECKONIDiE. 



Geckotiens, part., Cuvier, Eigne Anim. ii. 1817. 



Ascalabotae, part., Merrem, Tent. Syst. Amph. 1820. 



Geckotidae, part., Gray, Ann. Phil. (2) x. 1825. 



Ascalabotoidea, part., Fitzinger, Neue Claasif. Rept. 1826. 



Platyglossse, part., Wagler, Syst. Amph. 1830. 



Ascalabotae, part., Wiegmann, Herp. Mex. 1834. 



Geckotiens ou Ascalabotes, part., JDumeril ^ Bibron, Erp. G4n. iii. 



1836. 

 Ascalabotae, part., Fitzinger, Syst. Rept. 1843. 

 Geckotidae, part, Gray, Cat. Liz. 1845. 



Gecconidae, part., Cope, P-oc. Am. Assoc. Adv. Sc. xix. 1871. 

 Geckonidae, Boulenger, Ann. ^ Mag. N. If. (6) xiv. 1884. 



The skull is generally much depressed, and its bones are thin. 

 The nasals remain distinct ; the frontal is either single or with 

 distinct suture ; the jugal is rudimentary, the orbit not being bound 



b2 



