Lacerta. 127 



32 to 43 scales across body, dorsals keeled, laterals smaller ; 

 preanal shield bordered by a single semicircle of smaller 

 shields; 3 to 11 granules between supraoculars and super- 

 ciliaries ; hind limb reaching elbow or axil in males, wrist 

 in females ; 9 to 1-t femoral pores ; 21 to 25 lamellae under 

 fourth toe ....... Z. j)»Yi<icoZa, Eversm., p. 145. 



B. No parietal foramen. 



38 to 50 scales across body, dorsals keeled, laterals smaller ; 

 preanal shield bordered by a single semicircle of smaller 

 shields ; a series of granules between supraoculars and super- 

 ciliaries ; hind limb reaching collar in males, beyond axil in 

 females ; 7 to 10 femoral pores . . . L. vauereselU, Torn., p. 149. 



As shown by Parker's* and Bayer'sf figures, and as confirmed by 

 Siebenrock,J there is only one postfrontal bone in L. vivipara, even at 

 an early age, instead of tAvo as in L. agilis. The two ai'e distinct in 

 L. derjiujini and L. praticola, a feature which shows that these species 

 cannot have been derived from L. vivliyara ; their common ancestor 

 must have been intermediate between the latter and L. agilis. 



11. LACERTA VIVIPAKA. 



Lacerta agilis, part., Linn. S. N. i, p. 363 (1766); Schulz, Faun. 

 March, p. 448 (1845). 



Lacerta vivipara, Jacquin, Nov. Act. Helvet. i, 1787, p. 33, pi. i ; 

 Eeichenb. Isis, 1837, p. 511 ; Dum. & Bibr. Erp. Gc'n. v, p. 204 

 (1839) ; Milde, Verh. Zool.-bot. Ges. Wien, xx, 1870, p. 1033; Fatio, 

 Vert. Suisse, iii, p. 81 (1872) ; Leydig, Deutschl. Saur. p. 212 (1872) ; 

 Schreib. Herp. Eur. p. 429 (1875) ; Lataste, Herp. Gir. p. 77 (1876) ; 

 Collin de Plancy, Bull. Soc. Sc. Semur, 1877, p. 24, and Bull. Soc. 

 Zool. France, 1877, jk 349 ; F. Milll. Verlv Nat. Ges. Basel, vi, 1878, 

 p. 413 ; Camerano, Mon. Saur. Ital. p. 82, pi. ii. (1885) ; Bedriaga, 

 Abh. Senck. Ges. xiv, 1886, p. 338 ; Bouleng. Cat. Liz. iii, p. 23 

 (1887) ; Mchely, Beitr. Mon. Kronstadt, Herp. p. 16 (1892) ; Bureau. 

 Bull. Soc. Sc. Nat. Quest France, iii, 1893, p. 59, pi. i ; Douglass, 

 Herp. Baden, p. 15 (1894) ; Martin & Rollinat, Vert. Dcp. Indre, 

 p. 283 (1894) ; Werner, Kept. Amph. Oesterr.-Ung. p. 33 (1897) ; 

 Diirigeu, Deutschl. Amph. Rept. p. 167, pi. xii, figs. 1, 2 (1897); 

 Gadeau de Kerville, Faune Normand. iv, p. 165 (1897) ; Werner, 

 Wiss. Mitth. Bosn. Herzeg. vi, 1899, p. 819; Nikolsky, Fedtschenko's 

 Reise, Zool. ii, pt. viii, p. 32 (1899) ; Kiritzescu, Bui. Soc. Sc. Bucur. 



* Phil. Trans. R. S. 1879, pi. xU. 



t Vestn. Cesk. Spol. Nauk (Prague), 1893, pi. v. 



I Sitzb. Ak. Wien, ciii, i, 1894, p. 240. 



