90 Lacertidx. 



A further spedmen, a very young from Bash Nurashin, N.W. Persia 

 (E. T. Giinther), has 38 scales across the body, and 17 femoral pores 

 on each side. 



This form connects the var. strigata with the typical L. viridis, and 

 especially the oriental specimens on which the name var. vaillanti has 

 been bestowed, agreeing with the latter in the temporal scutellation 

 and the reduction in the number of superciliary granules, with the 

 former in the presence of a light vertebral streak in the young ; it 

 differs from both in the lepidosis of the body, with respect to which 

 it approaches L. princeps. A further peculiarity of this variety 

 as compared to the typical fonn resides in the low number of 

 transverse rows of ventral plates ; but the variation in the var. stngata 

 shows that much importance should not be attached to it. 



Var. SCHEEIBEEI. 



Lacerfa agilis, vars. b, c, Schreib. Herp. Eur. p. 434 (1876). 



Lacerta schreiberi, Bedriaga, Arch. f. Nat. 1878, p. 299, pi. x, 

 fig. 3, and 1879, pi. xviii, fig. 2 ; Seoane, Ident. de Lac. Schreiberi y 

 1. Gadovii (1885) ; Schreib. Herp. Eur., ed. 2, p. 486 (1912). 



Lacerta viridis, Boettg. Zeitschr. Gres. Naturw. (8) iv, 1879, p. 605. 



Lacerta viridis, var. gadovii, Bouleng. Proc. Zool. Soc. 1884, p. 433, 

 pi. xxxviii ; Bedriaga, Abh. Senck. Ges. xiv, 1886, p. 74, and Amph. 

 Eept. Portug. p. 48 (1889). 



Lacerta viridis, var. schreiberi, Bedriaga, Abh. Senck. Gres. t.c. 

 p. 76; Bouleng. Cat. Liz. iii, p. 16 (1887), and Bol. Soc. Espan. 

 H. N. xix, 1919, p. 62. 



Lacerta viridis, var. ventrimaculata, Diirigen, Deutschl. Amph. 

 Eept. p. 127 (1897). 



This is the most distinct of the varieties of L. viridis. It has many 

 points, both of structure and of coloration, in commou with L. agilis, 

 and it is not surprising that it should have been referred to that 

 species at a time when a close study of the scaling was generally 

 neglected. It bears also some resemblance to L. ocellata, and I was at 

 first inclined to regard it as an annectant form between L. viridis and 

 L. ocellata, var. pater ; Bedriaga went even so far as to pronounce it 

 the European representative of L. pater. I now believe its undeniable 

 approximation to L. ocellata to be explainable as a case of convergence 

 — convergence of the lines of evolution from a common stock — as 

 its resemblance to L. agilis points to a direct derivation from that 

 species. 



The principal points of resemblance with L. agilis reside in the 



