LACEETA MURALIS IN" WESTERN EUROPE AND NORTH AFRICA. 371 



Dorsal scales (PI. XXVI. fig. 1 b) granular, roundish-hexagonal, more or less feebly 

 but always distinctly keeled, 55 to 68 across the middle of the body ; 3 and 4 trans- 

 verse series (rarely 4 throughout) correspond to one ventral plate, 35 to 47 to the length 

 of the head. 



Ventral plates in 6 longitudinal and from 26 to 30 transverse series. 



Anal plate bordered by one or two semicircles of small plates. 



Scales on upper surface of tibia finely granular, much smaller than dorsals, more or 

 less distinctly keeled. 19 to 24 pores under each thigh. 26 to 31 lamellar scales 

 under the fourth toe. 



Upper caudal scales strongly keeled, truncate or very obtusely pointed behind ; the 

 whorls subequal in length, the fourth behind the postanal granules containing 30 to 3S 

 scales. 



Brown, yellow, or green above, with black or reddish-brown spots or vermiculations, 

 usually arranged in five or seven more or less well-defined longitudinal stripes ; the 

 black markings sometimes forming chains enclosing roundish light spots, or an irregular 

 reticulate pattern, or reduced to mere dots or vermiculations ; females often with a light 

 dorso-lateral streak, beginning from the supraciliary edge, sometimes bordered by fine 

 black lines, sometimes with a black vertebral streak ; upper surface of head spotted or 

 vermiculated with black ; tail with dark and light markings, forming more or less 

 regular longitudinal series. Young with six light streaks on the body. Belly yellow, 

 orange, or red, without markings, except on the outer row of ventral plates, which 

 bears large blue spots. 



Measurements (in millimetres) of two of the type specimens in the Lataste 

 Collection : — 



6. $• 



From snout to vent 72 64 



„ fore limb 30 23 



Length of head 18 15 



Width of head 13 9 



Depth of head 11 7 



Fore limb 28 19 



Hind limb 40 32 



Foot 21 17 



Tail 145 85* 



* Tail reproduced. 



I have examined 79 specimens, all collected by Sr. E. Bosca on Iviza, three of 

 which belong to the Lataste Collection, the rest being in the British and Madrid 

 Museums. 



