564 MR. G. A. BOULENGER ON [June 18, 



Ventral plates in 6 (exceptionally 8) longitudinal and 25 to 32 

 transverse series. 



Anal plate moderately large or rather small, with two or thi'ee 

 semicircles of small plates or scales, one or two of the median 

 plates of the inner semicircle sometimes considerably enlarged. 



Scales on upper surface of leg usually smaller than the dorsals, 

 more or less distinctly keeled. 22 to 29 lamellar scales under the 

 fourth toe. 



Femoral pores 15 to 25 on each side, 15 to 20 (usually 16 to 19) 

 in the typical form*, 15 to 25 (usually 18 to 21) in the Ionian 

 specimens. 



Caudal scales more or less obtusely pointed behind, the upper 

 strongly keeled, the lower smooth or feebly keeled ; the whorls 

 subequal in length ; the fourth or fifth whorl behind the postanal 

 granules contains 30 to 37 scales. 



Coloration. 



In the typical form (text-fig. 165 a) the brown colour pre- 

 dominates on the tapper parts, with the exception of a broad 

 vertebral stripe which is of a more or less bright green ; a 

 light streak may extend from the outer border of the parietal 

 shield to the base of the tail and another from below the eye 

 to the groin ; the sides of the body are moi-e or less spotted or 

 marbled with black, exce^jt on the green vertebral band, and the 

 black spots may extend across or over the light dorso-lateral 

 streaks, which often entirely disappear, especially in males. 

 In some specimens t (text-fig. 165 b) the black markings pre- 

 dominate over the ground-colour and enclose small whitish spots, 

 whilst in others they are large and few, forming a regular series 

 on each side of the back J, or small and numerous, or confluent 

 into a wavy line bordering inwards the light dorso-lateral streak §. 

 The lower parts are white, yellow, or deep orange, without spots, 

 or with small black sjDots on the sides ; pale blue spots are present 

 on the outer ventral plates and just above them. The dark and 

 light spots on the tail combine to form a more or less distinct 

 striation. 



In all the specimens from Greece and the Ionian Islands 

 examined by me, the green coloui- predominates (at least in the 

 spring) and the green and brown striation of the back is never 

 shown by them. However, as noticed above, specimens from 

 Roumania (text-fig. 165 c) ai"e intermediate between the two 

 types of coloration. In these Greek and Ionian specimens a 

 vertebral series of black spots is occasionally present. As observed 

 by Lehrs, a form withovit any spots or streaks, in either sex, occurs 

 on the Ionian Islands. 



Living specimens from Corfu are of a beautiful grass-green 



* 15 to 22 accoi-ding to Kessler. f Males from Hungary. 



X Females from Crimea, Roumania, and Bulgaria. 

 § Male from Roumania. 



