18 ME. G. A. BOrLEKGEE OX LIZAEDS 



superciliaiies, first longest, all in contact with the supraoculars, granu-les being 

 absent or reduced to a few * ; suture between the first and second superciliaries as 

 often vertical as oblique. One or two postnasals, followed usually by two super- 

 posed anterior loreals, as shown on text-fig. 2, p. 8 ; the anterior loreal exceptionally 

 single, smaller than the second, or even entirely absent f, the second usually in 

 contact with the second upper labial; 4 upper labials, rarely 5 t or 3 §, anterior 

 to the subocular, which is very variable in shape, sometimes nearly as long beneath 

 as above, sometimes much shorter. Two large and deep upper temporals, usually 

 equal in length, sometimes first or second the longer, each very rarely divided into 

 two ; these two shields partly on the upper surface of the head, the first rarely 

 forming a slightly convex suture with the parietal || ; the temple below them 

 covered with smaller shields very variable in size and shape (9 to 28 in number), 

 but generally large, among which a central masseteric and a tympanic are often 

 distinguishable (see text-tig. 3, p. 9), the tympanic usually in contact with the 

 second upper temporal. Lower eyelid opaque, with 6 to 10 enlarged, vertically 

 hexagonal scales in the middle, or with two superposed series of such scales. 



Pterygoid teeth constantly present, in a small cluster. 



14 to 21 (usually 16 to 19) scales and granules in a straight line between the 

 symphysis of the chin-shields and the median collar-plate ; gular fold feebly marked 

 or absent, rarely very distinct. Collar with strongly serrated edge, composed of 

 7 to 12 plates, usually 8 to 10. 



Scales on vertebral area (8 to 12 rows) very narrow, elliptic or hexagonal, strongly 

 keeled, juxtaposed, more or less sharply differentiated from the larger dorso- 

 laterals ^, which are much broader, rhombic or hexagonal, subimbricate, and also 

 strongly keeled ; lower down on the sides the scales becoming smaller, feebly and 

 diagonally keeled, and then again increasing in size, oval, round, or squarish, smooth 

 or faintly keeled, and passing more or less gradually into the outer ventral plates ; 

 33 to 47 scales (usually 36 to 40) across the middle of the body ; 2, or 2 and 3, lateral 

 scales correspond to a ventral plate ; 16 (female) to 30 (male) transverse series of 

 scales, in the middle of the back, correspond to the length of the head. Ventral 



* 1-2 in a female from Bazias, 2-3 in a male from Freucham Common and in a female from Arlon, 3-4 in 

 a female from Farntiam, 3-5 in a young from Mondorf, 4-5 in a female from La Roche-en-Breil. 



t Out of 240 cases I note for the postnasal and anterior loreal: 1,1 10 times, 1,2 140 times, 2,2 

 55 times, 2, i 5 times, 2, 3 2 times, 2, 19 times, k means that the anterior loreal is partly fused with 

 the postnasal. 2, 1, frequent in the vars. chersonensis and e.vigua, does not occur at all. 



t Male from Farnhara, female from Churt, male and female from Soutliport, male and female from 

 Hermannstadt, female from Itiisseldorf, 5 specimens from Berlin and Vienna. 



§ Male from Freiburg, male from Hermannstadt, young from Lausanne. 



I| Female from Bazias, males from Lausanne, Vienna, and Hermannstadt. 



% There are, however, rare exceptions, as in males from Lausanne and in a fem'ilc from Vienna in which 

 the dift'tft'euce is very feebly marked. 



