138 DR. J. AKDERSON ON REPTILES AND [May 21, 



smaller scales, some of them ou the middle of the back showing a 

 tendency to carination. • Scales of the upper surface of the head 

 juxtaposed, flat, rounded, hexagonal. A few I'ounded tubercles 

 on the temporal and occipital regions. B-ostral once and nearly 

 one half as broad as high, upper external angles rounded off, mesial 

 line cleft in its upper half. Nostril defined by the rostral, first 

 labial, and three nasals. Ten upper and lower labials. Mental 

 nearly as broad as long, outer margin opposed to first labial, concaye, 

 with another shorter concave margin behind it, against which lies a 

 small shield, the most anterior of the line of enlarged granules 

 which lies below the lower labials. Gular scales granular. Ventral 

 scales more or less pointed and feebly carinated. Tail verticillate 

 throughout, cylindrical in its anterior half, and flattened from above 

 downwards in its posterior moiety, with the tip slightly laterally 

 expanded ; no enlarged scales inferiorly. Limbs moderate ; 

 digits slender, with two or three of the distal phalanges 

 forming an angle with the base as in Gymnodactylus, covered with 

 transverse lamellae more or less spiny or tubercular. Four preanal 

 pores. General colour greyish, the head finely and obscurely 

 speckled irregularly with black. A broad black band passing 

 from side to side across the nape of the neck from behind the 

 temporal region, succeeded by five similar broad bands on the 

 trunk and eight on the tail, the intervening greyish areas being not 

 quite so broad as the black bands. The dark bands are continued 

 down on both sides of the trunk, but on the tail they form rings. 

 Underparts whitish. 



Prom snout to vent 35 millimetres ; tail 23. 



This species is of considerable interest, as it seems somewhat to 

 connect the two genera Bunopus and Gymnodactylus together. Its 

 flattened tail somewhat expanded at the tip and the character of 

 the body-scales are its most striking features. 



Only one specimen was collected by Mr. Percival, in the Wadi 

 Jimil. 



3. Pristurus jlatipunctatus Eiipp. 



Numerous examples from the hills north of Lahej, towards 

 Jimil, and from the Jimil Valley. 



4. Prisiurus Cruciper Val. 



Numerous examples from the same localities as the preceding, 

 and also from the hill-country east of Aden, from Wadis between 

 Lahej and the mountains and below Mount Manif. 



5. Pristurus collaris Steindachner. 



Two specimens from the hills north of Lahej towards Jimil, and 

 one from the Wadis between Lahej and the mountains. These 

 specimens are exactly like those described from the Hadramut \ 

 This is the first time it has been recorded from Aden. 



^ Herpetology of Arabia (Anderson), 1896, p. 34. 



