ALLIED TO LACERTA MUEALIS. 17 



1^ to li- times as long as broad, its depth, in tlie tympanic region, equal to or a little 

 greater than the distance between the anterior corner of the eye and the anterior 

 border of the tympanum ; its length 3^ to 4 times in length to vent in males, 4 to 5 

 times in females ; cheeks more or less swollen, especially in males ; snout obtuse, 

 as long as postorbital part of head or as distance from eye to anterior border of 

 tympanum. Pileus Ij to 2 times as long as broad. Neck as broad as the head, 

 or broader, rarely a little constricted. Limbs short, slightly overlapping when 

 pressed against the body, or hind limb reaching as far as the elbow in males, just 

 meeting or hind limb reaching the wrist in females ; foot as long as the head or 

 a little shorter ; digits cylindrical, covered with two series of scales, one above and 

 one below, or lower series divided into two. Tail cylindrical, often squarish at the 

 base, thick, gradually thinning out in the second third, 1;^ to If, very rarely 1| times 

 length of head and body, but little over one-half of the total length in the very young. 

 Nostril pierced between two *, three, or four shields. Rostral well separated from 

 the nostril, bent back on the upper surface of the snout, its upper borders sometimes 

 meeting at right angle f ; frontonasal nearly always broader than long, sometimes 

 divided into two by a longitudinal cleft, narrower than the internarial space X, in 

 contact with the upper part of the anterior loreal, hardly ever with the postnasal § ; 

 suture between the nasals very short, rarely half the length of the frontonasal, some- 

 times absent through the rostral forming a narrow suture with the frontonasal || ; 

 pntfrontals usually forming an extensive suture, sometimes with an azygous shield 

 between them ; frontal as long as its distance from the rostral or from the end of the 

 snout, 1^ to If times as long as broad, broader behind than the supraoculars, except 

 in the very young ; parietals Ij to 1^ times as long as broad, outer border forming 

 an angular suture with the two upper temporals ; occipital usually shorter (^ to §) 

 than the interparietal, rarely as long, the two shields equal in width or either the 

 one or the other the broader. Four supraoculars, first very small and in contact 

 with the second loreal ^, second and third large, second usually longer than third, 

 fourth small and in contact with the first upper temporal ** ; 4 to 6 (very rarely 3 or 7) 



• Only in two female specimens (from Swanage and Lausanne) is the first labial excluded from the 

 nostril, such a condition answering to the definition of the allied genus I^'ucras. 



t In the female from Swanago just mentioned. 



X As broad as the internarial space in a male from Diisseldorf. 



§ Exception is a female from La llocho-en-lireil, Cote-d'Or, also distinguished by the presence of 4 or 5 

 granules between the supraoculars and the superciliaries. In a female from Lausanne the shield ia entirely 

 enclosed between the nasals and the prefrontals. 



II In males from Arlon, Prague, Vienna, in females from llingwood, Paris, Porte, Lausanne, Mondorf, and 

 in two young from the last locality. In a male from Berlin an azygous shield separates the nasals behind 

 the rostral. 



^ Except in two females from Berlin and in one from Churt. Absent on the left side in a male from 

 Freiburg, Baden. 



*• Except in a female from Tilford. 



VOL. XXI. — PART I. No. 3. — June, 1916. d 



