16 DR. J. ANDERSON ON MAMMALS, REPTILES, [Jan. 5, 



palpebral disk, the number of scales round the middle of the body is 

 52, the femoral poi-es being 10-10 in the first variation, and 11-10 

 in the second, whereas in my specimens the scales round the body 

 (including the ventrals) are 52-53, and the femoral pores are 11-14. 

 In Mr. Boulenger's specimens with six scales in the palpebral disk, 

 and with the collar distinct and attached in the middle, the femoral 

 pores are 14-13, while in the above-mentioned specimen, with the same 

 number of scales in the palpebral disk, there are only 11 femoral 

 pores, associated with 53 scales (including the ventrals) round the 

 body, whilst his specimens have 59 scales. Mr. Boulenger indi- 

 cates another variation with 3 scales in the palpebral disk, 68 scales 

 (including ventrals) round the body, and with 17-17 femoral pores. 

 These facts attest the correctness of M. Lataste's opinion, wliich 

 Mr. Boulenger shares, that no division of this species into subspecies 

 or varieties can be made on characters derived from the palpebral 

 disk and collar. 



Family VI. Scincid^. 

 Genus Mabuia, Fitzinger. 



16. Mabuia vittata, Olivier; Boulenger, loc. cit. p. 135. 



1, Djebel Ahmer Khaddon, south of Constantine ; 1, Biskra; 1, 

 between Biskra and Tuggurt. 



The largest specimen is from the first-mentioned locality, and 

 measures, from the snout to the vent, 75 millim., the tail 129. 



Genus Eumeces, Wiegmann. 



17. Eumeces schneideri, Daudin ; Boulenger, loc. cit. p. 136. 

 1 cJ & 2 $ , Duirat, Tunisia. 



Genus Scincus, Laurenti. 



18. Scincus officinalis, Laurenti ; Boulenger, loc. aY. p. 137. 



1 S , Sand-dunes, Debila, Sahara ; 1 J & 3 $ , Tuggurt ; 

 1 cJ & 3 2 , Duirat, Tunisia. 



In one of the specimens from Duirat there are 30 scales round 

 the body, in the other 26-28. These specimens present two types 

 of coloration, being either uniformly yellowish above or marked in 

 additioii with dark brown bars more or less continuous across the 

 back, strongly or obscurely developed. 



Genus Chalcides, Laurenti. 



19. Chalcides ocellatus, Forskal ; Boulenger, loc. cit. p. 138. 



11, Biskra; 1, Djebel Ahmar Khaddon, south of Constantine; 

 6, Duirat, Tunisia. 



The largest specimen is 116 millim. from the snout to the vent, 

 and, in one measuring 104 millim., the hind limb is 2 5 miUim. The 

 scales round the body vary from 28-32 in number, whereas those 



