88 Lacertidm. 



$ ? 



Hind limb 64 46 



Foot 26 24 



Tail 165 — 



The three ill-defiued forms which I thiuk deserve recognition under 

 the names of var. euphraticus, forma tyjjiea and var. asper, constitute 

 a highly suggestive gradational series ; the condition of the subocular 

 shield jjointiug to the first being the nearest to the hypothetical primitive 

 Acanflwdaciyl'us. These forms may be thus contrasted : 



Subociilar usually bordering the moxith ; first supraocular divided ; 38 to 48 

 scales across middle of body, 14 to 16 between hind limbs: 23 to 27 femoral 

 pores on each side Var. euphraticus, Blgr. 



Subocular not bordering the nioutli ; first supraocular usually divided ; 34 to 

 52 (usually 38 to 43) scales across middle of body, 12 to 10 between hind 

 limbs ; 21 to 31 (usually 22 to 28) femoral pores . . Forvm typka. 



Subocular not bordering the mouth ; first supraocular usually undivided : 

 23 to 38 (usually 25 to 35) scales across middle of body, S to 14 between hind 

 limbs; 15 to 27 (visually 17 to 24) femoral pores . . Var. asper, Aud. 



Habitat. — Palestine, Mesopotamia, Arabia, Coasts of the Red Sea, 

 Egypt, Nubia and Egyptian Sudan, Tripoli, Tunisia, Algeria, south 

 of the Plateaux aud far into the Sahara, to the north-west of Lake 

 Chad.* The reported occurrence of this lizard iu Persia, although not 

 improbable in view of its recent discovery in Mesopotamia, awaits 

 confirmation, as based on one of the Aucher-Eloy sjwcimens in the 

 Paris Museum. t 



Parfii-iilar.'i uf Specimens Examined. 



* Pellegrin, Bull. Mus. Paris, 1909, p. 413.— The specimen, which I have 

 examined in the Paris Museum, is a young one, and belongs to the var. asper. 

 t See remarks above, under Lacerta viridis, var. vaillanti (vol. I, p. 77). 



