Lacerta. 187 



(J Lagosta . 



Columns as on p. 175. 



A description of the form and scaling would be almost entirely a 

 repetition of that of the var. fiumana. I will only observe that^ 

 whereas the collar is usually feebly serrated in the specimens from 

 Lissa, as in the var. fiumana, it is entire in those from Lagosta. The 

 size is larger than usual in the var. fiumana. The temporal scutella- 

 tion is variable, and the masseteric disc may be absent, but it is often 

 large and in contact with the anterior upper temporal. The occipital 

 is usually small or very small, and is sometimes pointed in front, or 

 even separated from the interparietal — a feature which appears to be 

 the rule in the black form occurring on Melisello. Only one specimen 

 has 6 anterior labials, and on one side only. The scales on the back 

 are distinctly keeled ; they may slightly increase in size and completely 

 lose the keels on the lower part of the flanks ; the caudal scales are 

 truncate rather than pointed. 



Var. MELISELLENSIS. 



Lacerta melisellensis, Braun, Arb. Zool. Inst. Wiirzb. iv, 1877, p. 49, 

 pi. ii, fig, 4. 



Lacerta muralis, var. melisellensis, Bedriaga, Nature, xx, 1879, p. 481 ;. 

 Bouleng. Tr. Zool. Soc. xx, 1913, p. 174, pi. xix, figs. 10 and 11. 



Lacerta muralis fusca, var. melisellensis, Bedriaga, Abh. Senck. G-es. 

 xiv, 1886, p. 197. 



Lacerta muralis neapolitana, var. merremi {melisellensis), Werner,, 

 Verh. Zool.-bot. Ges. Wien, xli, 1891, p. 754, and Kept. Amph. Oesterr.- 

 TJng. p. 44 (1897). 



Lacerta serpa, var. melisellensis, Werner, Verh. Zool.-bot. Ges. Wien, 

 lii, 1902, p. 386 ; Schreib. Herp. Eur., ed. 2, p. 454 (1913). 



Lacerta litoralis, var. lissana, forma melisellensis, Scherer, Bl. f . Aq. 

 Terr.-K. xv, 1904, p. 193, fig. 



Lacerta serpa, var. galvagnii, Werner, Mitth. Naturw. Ver. Univ. 

 Wien, vi, 1908, p. 49. 



There are few better examples of the difficulty of discriminating 

 between the races of Lacerta muralis, which are so often proclaimed 



