228 Lacerticl-c. 



Upper head-shields finely striated ; subocnlar not reaching the 



mouth ; 20 to 24 femoral pores on each side . 9. E. hrenneri, Peters, p. 254. 



Section III. T.i:NiEREMiAS, Blgr. — Three nasals, the lower and the posterior 



resting on the first iipper labial; ventral plates in 10 straight longitudinal 



series ; no occipital ; toes feebly compressed, with tricarinate lamellce inferiorly. 



— West Africa. 



60 smooth scales across middle of body; 21 femoral pores on 



each side 10. E. riuineensis, Blgr., p. 256. 



Section IV. Mesalina, Gray.— Three nasals, the lower in contact with the 

 rostral and the first (very rarely first and second) upper labial ; ventral plates 

 in 10 to 18 (exceptionally 8) straight longitudinal series, rarely irregular 

 or tessellated ; occipital usually present ; toes feebly compressed, with bi- or 

 tricarinate lamella; interiorly.— Africa and S.W. Asia. 



A. North African and Asian species. Collar curved or angular, sometimes 



distinct on the sides only. 



1. Nasals in contact behind the rostral; 32 to 62 scales across middle 



of body ; 9 to 17 femoral pores on each side. 



Head and body rather strongly depressed, limbs moderately 



slender; head If to If times as long as broad; occipital 



present, neai-ly always in contact with the interparietal 



or separated from it by a small shield ; ventral plates in 



10 (rarely 8) longitudinal sei'ies ; scales on upjier surface 



of tibia keeled 11. E. guttulata, Licht., i). 258. 



Head and body strongly depressed, limbs very slender ; head 

 I5 times as long as broad ; occipital absent or minute and 

 not in contact with interparietal ; ventral plates in 10 

 longitudinal series ; scales on upper surface of tibia smooth 

 or obtusely keeled . . . . 12. E. adraynitana, Blgr., p. 271. 



Habit rather stout; head not strongly depressed, li to 



11 times as long as broad; occipital absent or minute 

 and not in contact with interparietal ; ventral plates in 



12 (rarely 10) longitiidinal series ; scales on upper surface 



of tibia smooth or obtusely keeled . 13. E. brevirostris, Blanf., p. 273. 



2. Eostral often in contact with frontonasal; 53 to 67 



scales across middle of body ; occipital present ; ven- 

 tral plates in 12 (rarely 10 or 14) longitudinal sei-ies : 

 13 to 22 femoral pores on each side. 



14. E. rubroinmctafa, Licht., p. 276. 



B. South African species. Collar straight and perfectly free. 



1. A narrow tympanic shield ; ventral plates in 10 or 12 longitudinal 

 series ; ^ to 4 of the lateral border of the frontal in contact 

 with the two large supraoculars ; nasals in contact behind the 

 rostral. 

 Lower eyelid semi-transparent, with 10 to 12 enlarged scales 

 in the middle, one of which may be much larger than the 

 others; 47 to 65 scales across middle of body; ventral plates 

 in 12 (rarely 10) longitudinal and 28 to 33 transverse series. 



15. E. 7iamaqnensis, D. & B., p. 280. 



