174 MR. G. A. BOULENGER ON THE 
size is larger than usual in var. fiwmana. The temporal scutellation is variable, and 
the masseteric disk may be absent, but as a rule it is large and in contact with the 
anterior supratemporal. 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 5 
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. 
Measurements (in millimetres) :— 
Lissa. Lagosta. 
é. 3. Q. 
Krom end of snout to vent . 2. Oo 64: 53 
3 * 55 fore linibY (iano 20 18 
Fréadt ., Alcfrnsots: Wi Wat) ae Scat cok re 16 12 
Wiadth-ofshead. 5" -y =, -e) -tu 1c eco LO jl 8 2 
Wepthioliheadwyu-y i.) oul lwo ee 8 8 6 
Hore limbs <j. Ga Wed ss ds eee 21 ite 
Hind Jimi: 20 cy ise ae es) Se OO 34 if 
Boot: 6, & s ebe Veu uk: (eae LS 18 15 
Tare es 25, true ve es te ea get pee oO mam 95 
A male from Lissa (one of the types), and one from Lagosta, are figured on Pl. XIX. 
figs. 8 & 9. 
Var. MELISELLENSIS. 
(Melisello and St. Andrea, near Lissa.) 
Lacerta melisellensis Braun, Arb. Zool. Inst. Wiirzb. iv. 1877, p. 49, pl. ii. fig. 4. 
Lacerta muralis, var. melisellensis Bedriaga, Nature, xx. 1879, p. 481. 
Lacerta muralis fusca, var. melisellensis Bedriaga, Abh. Senck. Ges. xiv. 1886, p. 197. 
Lacerta muralis neapolitana, var. merremi (melisellensis) Werner, Verh. zool.-bot. Ges. Wien, xli. 
1891, p. 754, and Rept. Amph. Oesterr.-Ung. p. 44 (1897). 
Lacerta serpa, var. melisellensis Werner, Verh. zool.-bot. Ges. Wien, li. 1902, p. 386. 
Lacerta litoralis, var. lissana, forma melisellensis, Scherer, Bl. f. Aq.- u. Terr.-K. xv. 1904, p. 193, fig. 
Lacerta serpa, var. galvagnit 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 emphatically proclaimed by some authors to be 
entitled to specific rank, than that afforded by the black lizard of the Melisello Rock 
near Lissa, first described by Prof. Max Braun as L. melisellensis. 
‘The view entertained by Bedriaga that the Melisello lizard is a black insular race of 
the typical LZ. muralis (his 1. muralis fusca) would, in the light of our present 
information, be highly surprising, since it has been shown that the latter does not 
exist on Lissa nor on any of the islands off the coast of Dalmatia. Later, however, 
Werner and Lehrs pronounced it to be merely a melanic form of the var. neapolitana 
or serpa, which, at Capri, produces the L. cewrulea or faraglionensis. 
