60 Lacertiche. 



Measurements (in millimetres) : 



From end of snout to vent . 



,, ,, „ fore limb 

 Length of head . 

 Width of head . 

 Depth of head 

 Fore limli .... 

 Hiud limh .... 

 Foot . . • . 

 Tail 



ParUcidfir.'i of Spei'imeiis Examined. 



$ Oran ftype of v. 



S W. desert of Algeria, P.M. 

 „ Algeria? (type of A. vail- 



2aJiHl, P.M. . . 75 (iO 10 30 11 26 23 21 4 



The name under which I describe these Algerian specimens has 

 been applied in the past to very different lizards, and has given rise 

 to much discussion. 



I have first of all no hesitation in regarding the Acanlhudactiiln^ 

 discovered near <)rau by M. Doumergue as specifically identical with 

 A. vaillaiUi, Lataste, stated to lie from Somaliland. Geographical 

 considerations alone seem to have induced Doumergue to propose 

 for it the name of oranensis. Does, however, A. raidaidi really come 

 from Somaliland ? 



In his report on the collection made in Somaliland by Ecvoil, 

 Vaillant has recorded several specimens of Acaufhodacfylns, under 

 the names of A. vulgaris, A. savitinyi, and A savignyi, var. schreiberi. 

 These specimens have since been re-examined by Lataste and by 

 Anderson, and the two former names have been shown to refer partly 

 to A. pardalis, partly (one specimen only) to a species described as 

 new by Lataste under the name of A. vadhmti, the third to A.scnfellatnu. 



