4. TACERTA. 11 



2. Ventrals in 12 or 14 longitu- 



diual rowd li>. yaUoti, p. 41. 



11. Lower eyelid with an undivided transparent disk. 



Dorsal scales granular; ventrals in 10 



longitudinal rows 21. perspicillata, p. 43. 



1. Lacerta echinata. 



Lacerta (Zootoca) echinata, Cope, Proc. Ac. Philad. 1862, p. 189. 



hirticauda, Vaillant, Ball. Soc. Fhilom. (7) viii. 1884, p. 1G8, 



and Bull. Soc. Zuol. France, 1885, pi. xii. fig. 1. 

 echinata, Bedriaya, Abh. Senclcenh. Ges. xiv. 1886, p. 385. 



Head rather strongly depressed ; snout long, obtusely acuminate. 

 Rostral entering the nostril ; a single postnasal ; four upper labials 

 anterior to the subocular; supraoculars in contact with the supra- 

 ciliarios ; occipital shorter and broader than the interparietal ; 

 temples covered with uniform small, obtusely keeled, granular 

 scales. No distinct gular fold ; gular scales gradually increasing in 

 size towards the collar, 35 to 43 between the latter and the median 

 suture between the chin-shields ; collar with serrated edge, com- 

 posed of eight or nine plates. Dorsal scales rather large, rhom- 

 boidal, juxtaposed, obtusely keeled, 3G to 38 across the middle of 

 the body ; two or three scales correspond to the length of a ventral 

 plate. Ventrals in 6 longitudinal series, median pair nari'owest, and 

 28 to 30 transverse series. Prasanal bordered by a semicircle of 

 smaller plates. The hind limb reaches the axilla or the elbow 

 of the adpressed fore limb ; digits slender. Femoral pores 12 or 

 13. Tail more than twice as long as head and body, the scales on 

 the anterior third of the nppcr surface very strongly keeled, and 

 ending in a sharp raised point. Green above, uniform or with a 

 black network ; sides black-spotted ; lower surfaces greenish. 



millim. milliin. 



Total length 276 275 



Head 19 22 



Width of head 11 14 



From end of snout to fore limb . . 30 37 



From end of snout to vent 76 100 



Fore limb 29 33 



Hind limb 39 45 



Tail 200 175* 



West Africa (Liberia to Gaboon). 



a. $. Camaroons. D. G, Rutherford, Esq. [C.l. 



b. S. W. Africa. 



Tail injured. 



