210 



9 Portes de Fer, Algiers (type) 

 (J Toukous (type) 

 „ Tafreut 



^ Batua 



2 

 6 



(J Mnila, ur. Tunis 

 ? Temasmida, Tunisia 

 ,, Feriana ,, 



„ Haded] des Matmata, 

 (^ Susa, Tunisia (type) 



? Tunisia, L.M. . 



Habitat. — Algeria (Tell and High Plateaux), Tunisia, and Tripoli 

 (Cyrenaica). Its reported occurrence at Bislcra (fide Boettger) is, 

 as pointed out by Werner, probably due to a mistake. 



Very closely allied to 0. elegans and evidently derived from the same 

 common ancestor, but less advanced in the absence of a series of 

 granules bordering the supraoculars, and more so in the generally larger 

 size of the dorsal scales and the greater reduction or loss of the 

 occipital shield. 



