LACEETA MUEALIS IN WESTEEN EUROPE AND NORTH AFEICA. 409 



Podarcis muralis, var. tiliguerta De Betta, Atti 1st. Ven. (5) v. 1879, p. 389. 

 Lacerta serpa, part., Camerano, Mon. Saur. Ital. p. 56 (1885). 



Head (PI. XXVIII. fig. 7) once and a half to once and two-thirds as long as 

 broad, rather strongly depressed, the occiput quite flat or even slightly concave, its 

 depth in the tympanic region equal to the distance between the centre of the eye 

 and the anterior border of the tympanum ; snout obtusely pointed, as long as the 

 postorbital part of the head. 



Neck as broad as or a little narrower than the head. Body moderately depressed. 

 Hind limb reaching between the collar and the ear in males, the axil, the shoulder, or 

 the collar in females ; foot once and one-sixth to once and a half the length of the 

 head. Tail rounded in section, about twice as long as head and body. 



Rostral shield never entering the nostril, and usually separated from the frontonasal 

 by the nasals x ; postnasal single ; frontal as long as its distance from the end of the 

 snout or a little shorter ; a series of granules between the supraciliaries and the principal 

 supraoculars, the first of which is usually in contact with the first supraciliary ; parietals 

 once and one-third to once and four-fifths 2 as long as broad, rarely in contact with the 

 upper postocular 3 ; occipital as long as or shorter, and usually not broader, than the 

 interparietal ; temporal scales granular, small ; tympanic shield distinct ; masseteric 

 shield usually small or absent ; usually four upper labials anterior to the subocular 4 . 



Collar even-edged or very slightly serrated, with 8 to 12 plates; 27 to 33 scales and 

 granules in a longitudinal series between the symphysis of the chin-shields and the 

 median collar-plate ; gular fold distinct. 



Dorsal scales very small, convex, round or oval-hexagonal, feebly but distinctly 

 keeled; 65 to 77 scales across the middle of the body ; 3 and 4, 4, or 4 and 5 trans- 

 verse series correspond to one ventral plate, 4-5 to 58 to the length of the head. 



Ventral plates in 6 longitudinal 5 and 25 to 31 transverse series. Prseanal plate 

 rather small, with two semicircles of small plates. 



Scales on upper surface of tibia feebly keeled, as large as or a little smaller than 

 dorsals ; 21 to 26 femoral pores on each side ; 30 to 34 lamellar scales under the 

 fourth toe. Upper caudal scales strongly keeled and truncate or very obtusely pointed ; 

 30 to 40 scales in the fourth whorl behind the postanal granules. 



Adult males (PI. XXIX. fig. 5) are bright greeu or greenish yellow on the back, 

 grey-brown on sides, limbs, and tail ; the ocellus above the axil and spots on the 

 outer ventral shields turquoise-blue; some adult females are bright green above, 



1 In two of the specimens examined, the rostral forms a suture with the frontonasal. 



2 As in some specimens of the vars. bedriar/ce and sardou. 



3 The contact is extensive in but one out of 20 specimens examined ; it is very slight in two other specimens, 

 absent in the 17 others. 



1 Five on one side in two specimens. 



5 The plates of the outer row are divided into two in one specimen. 



O II Ji 



