10. ACATTTH0DACTTLT7S. 59 



Upper caudal scales strongly keeled ; toes 



very feebly but symmetrically pectinate. 9. vulgaris, p. 67. 



Scales on tbe basal third of the tail per- 

 fectly smooth ; toes very feebly pectinate 10. tristrami, "p. 6S. 



B. More than 10 ventral plates across the middle of the body. 



Yentrals in 14 to 18 longitudinal series, 



not broader than long ; snout acute ; the 



scales forming the digital pectination 



(fourth toe) at least as long as the dia- 

 meter of the corresponding part of the 



toe 7. scutellatus, p. 64. 



Yentrals in ]2 or 14 loni^itudlnal series, the 



median broader than long ; snout more 



obtuse ; the scales forming the digital 



pectination shorter than the diameter of 



the corresponding part of the toe 8. pardalis, p. 65. 



1. Acantliodactylus boskianus. 



Acanthodactylus boskianus, Grai/, Cat. p. 38. 

 Lacerta boskiana, DaucL Itept. iii. p. 188, pi. xxxvi. fig. 2 ; Licht. 

 Verz. Doubl. 31>/s. Berl. p. 103 ; Aud. Descr. Egypte, Rept., Suppl. 



p. 173, pi. i. fig. 9. 



■ aspera, Aud. I. c. p. 174, pi. i. fig. 10. 



Acanthodactylus boskiauus, Wie(jm. Herp. Me.v. p. 10 ; D\im. ^ 



Bihr. V. p. 278 ; Strauch, JErp. Alg. p. 38 ; Boideng. Bull. Soc. 



Zool. France, 1878, p. 182, and Froc. Zool. Soc. 1881, p. 744, 



pi. ixiii. tig. 2 ; Eimer,Arch. f. Nat. 1881, pi. xv. fig. 26; Lataste, 



Ann. Mas. Gcnov. (2) ii. 18S5, p. 496. 

 Scapteira iusequalis, Gray, Ann. N. H. i. 1838, p. 280. 

 Acanthodactylus asperus, Bonap. Faun. Ital. 



Snout obtuse. Four supraoculars, the fourth very seldom broken 

 up into small scales ; subocular not reaching the lip ; temporals 

 smooth or more or less strongly keeled : front edge of the ear 

 usually distinctly denticulated. Dorsal scales strongly keeled, very 

 much larger on the hinder part of the back than between the 

 shoulders and on the flanks, rhomboidal, strongly imbricate ; 10 to 

 14 (seldom 16, according to Lataste) large keeled scales on a 

 transverse line between the hind limbs. Yentral plates considerably 

 broader than long, in straight longitudinal and transverse series ; 

 10 (seldom 12) plates across the middle of the body. A median 

 series of broad praeanal plates, posterior largest. The hind limb 

 reaches the shoulder, the ear, or the eye. Digital denticula- 

 tions strong, usually shorter than the corresponding diameter of 

 the toe, much more developed on the outer than on the inner edge 

 of the fourth toe. Upper caudal scales strongly keeled ; the scales 

 under the base of the tail smooth or obtusely keeled. Young -with 

 ■whitish longitudinal lines separated by blackish interspaces with 



