GECKONIDiE. 



4 



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

 ■with osteodermal plates as in the preceding. 



-f' Fam. 19. Anelytropidse. Premaxillary single ; no arches ; no 

 osteodermal plates. 



Fam. 20. Sibamidse. 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. 21 . Chamseleoutidse. 



Suborder I. LACERTILTA VERA. 



Lep'toglossi, Paehyglossi, Annulati, Wiegmann, Herp. Mex. 1834. 

 Oyclosaura, Geiasosaura, Nyctisaura, Strobilosaura, &i-ay, Cat. Liz. 



1845. 

 Amphisbaenia, Chay, Cat. Tart., Croc, Amph. 1842. 

 AmpMsbsenoidea, Kionocrania, Stannius, Zoot. Amph. 1856. 

 Acrodonta Pachyglossa, Nyctisaura, Pleurodonta, Ophiosauri, Cope, 



B-oe. Acad. Philad. 1864. 

 AmpUsbsenoidea, Oionocrania, Nyctisaura, Gunther, Phil. Trans. 



clviii. 1867. 

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



Assoc. Adv. 8c. xix. 1871. 

 Lacertilia vera, Boidenger, Ann. Sr Mag. N. H. (5) xiv. 1884. 



Fam. I. GECKONIL^. 



Geckotiens, part., Cuvier, RhgneAnim. ii. 1817. 



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



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



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



Platyglossss, part., Wagler, Syst. Amph. 1830. 



AscalabotsB, part., Wiegmann, Herp. Mex. 1834. 



Geckotiens ou Ascalabotes, part., Bumeril 8f Bihron, Eip. G4n. iii. 



1836. 

 Ascalabotse, part., Fitzinger, Syst. Eept. 1843. 

 Geckotidse, part., Gray, Cat. Lin. 1845. 

 GecconidEe, part.. Cope, Proc. Am. Assoc. Adv. Sc. xix. 1871. 

 Geckonidse, Boulengei; Ann. Sf Mag. N. If. (6) xiv. 1884. 



The skuU 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 



