164 Lacertidie. 



Lacerta ninmlis, var. macidiventris, Weruer, Verh. Zool.-ljot. Ges. 

 Wien, xli, 1891, p. 752 ; Schreib. op. cit. p. 410. 



Lacerta imiralis, vars. oyensis et calbia, R. Blanch. Mem. Soc. Zool. 

 France, iv, 1891, pp. 505, 507, pi. iv. 



Lacerta muralis, var. hesperica, Schreib. op. cit. p. 943. 



? Lacerta muralis atrata, Bosca, Bol. Soc. Espan. H. N. xvi, 1916, 

 p. 329. 



Lacerta muralis riveti, Chaban. Bull. Mus. Paris, 1919, p. 23. 



Head a little less than 1^ to 1^ times as long as broad, more or less 

 depressed, its depth equal to the distance between the anterior corner, 

 the centre, or the posterior corner of the eye and the tympanum, its 

 length 3| to 4 times in length to vent in males, 4 to 5 times in females ; 

 snout more or less obtusely pointed, as long as or slightly shorter than 

 postoeular part of head ; cheeks not swollen. Pileus flat or feebly 

 convex, 1| to 2|- times as long as broad. Neck as broad as the head, 

 or slightly constricted. Body rather strongly depressed. Hind limb 

 reaching the axil, the shoulder, or the collar in males, the wrist or not 

 (|uite so far, the elbow of the adpressed fore limb, or the axil in 

 females ; foot up to 1|- times the length of the head, rarely (in 

 males) not longer than the head or even slightly shorter* ; digits 

 rather slender, more or less compressed. Tail cylindrical or cyclo- 

 tetragonal, often slightly flattened at the root, sometimes of equal 

 thickness in its anterior third or half, usually tapering from the base, 

 its length If to 2J times that of head and body,t shorter in the 

 very young. 



Pterygoids toothless. 



Nostril pierced between three shields (rarely four). Nasals usually 

 forming a median suture, variable in extent, but usually short ; rostral 

 sometimes J in contact with the frontonasal, which is usually broader 

 than long and broader than the internarial space, rarely in contact 

 with the frontal § ; an azygos shield sometimes separates the pre- 



* Male from Bosnia. The specimens from Bosnia, Herzegovina, and Bulgaria 

 have comparatively short hind limbs, not reaching beyond the axil in males — 

 the minimum in specimens from Central Europe. 



t Schreiber, op. cit., ed. 2, p. 943, mentions a male from Saragossa in which 

 the tail is nearly f of the total length. 



X Several specimens from Eaux-bonnes, St. Epain, St. Malo, and Dinant, 

 Belgium. Single specimens from Paris, Tours, Fontainebleau, St. Lunaire, 

 Dinan, Glenan Isles, Bordeavix, Hernani, Silos, and Bazias. (22 cases alto- 

 gether.) Also in at least 20 per cent, of the specimens from south of the 

 Alps. 



§ Specimens from Glenan Isles, Bordeaux, Eaux-bonnes, Florence, Autrodera, 

 Bozen, Herkulesbad. 



