402 MR. G. A. BOULENGER ON THE VARIETIES OF 
Lacerta muralis, var. filfolensis Eimer, Arch, f. Nat. 1881, p. 408, pl. xv. fig. 24; Bedriaga, Abh. 
Senck. Ges. xiv. 1886, p. 218. 
Podarcis muralis, var. filfolensis De Betta, Atti Ist. Ven. (5) v. 1879, p. 392. 
Giinther had only two specimens of the Filfola lizard before him when he published 
his remarks on Zootoca lilfordi, and both Bedriaga and Eimer do not appear to have 
had access to any very large material when writing their descriptions. The figures 
accompanying Braun’s remarks were taken from one of Ginther’s specimens in the 
British Museum, but are very inaccurate, as the author himself suspected. A few years 
ago, my friend Mr. Norman Douglass visited the Filfola Rock, and collected a good 
number of specimens, which he has kindly presented to the British Museum. The 
following description is based on 15 specimens, measuring from 56 to 82 millimetres 
from snout to vent. Eimer’s largest specimen (male) measured 90 millimetres without 
the tail. 
The depth of the head (Pl. XXVIII. fig. 5) equals the distance between the centre or 
the anterior border of the eye and the tympanum ; its width is once and a half to once 
and three-fifths inits length. The hind limb reaches the shoulder, the collar, or a little 
beyond in males, the elbow of the adpressed fore limb, the axil, or the shoulder in 
females ; the foot measures once and one-fourth to once anda half the length of the head. 
Except in two specimens, the rostral shield does not enter the nostril; the nasals 
form a suture behind the rostral; the frontal is as long as or considerably shorter than 
its distance from the end of the snout; a series of granules between the supraciliaries 
and the two principal supraoculars, this series complete in five specimens, whilst in nine 
the first supraciliary is in contact with the second supraocular, and the second 
supraciliary also in one specimen ; parietal once and one-third to once and two-thirds 
as long as broad, in contact with the upper postocular, except in one specimen ; 
occipital very variable in size, as long as or shorter than the interparietal, sometimes 
wider than the latter; supratemporal narrow or broken up; temporal scales small, but 
much larger than the dorsals; tympanic shield distinct ; masseteric shield usually well 
developed; four upper labials anterior to the subocular. 
Collar even-edged ; gular fold distinct. 
Dorsal scales granular-subhexagonal, feebly or faintly keeled; 68 to 82 scales across 
the middle of the body ; 4and 5 correspond to one ventral plate, 45 to 62 to the length 
of the head; ventral plates in 6 longitudinal and 26 to 31 transverse series. Anal 
plate rather large, bordered by one or two semicircles of small plates. 
Scales on upper surface of tibia smaller than dorsals ; 18 to 27 femoral pores on each 
side; 31 to 36 lamellar scales under the fourth toe. 
Upper caudal scales strongly keeled, truncate ; 34 to 42 scales in the fourth whorl 
behind the postanal granules. 
Eimer describes the colour of the living male lizard as intensely black above, with 
small roundish spots or dots which are greenish yellow on the middle of the back, more 
