ALLIED TO LACERTA WURALIS. 23 



marked as usual. In very rare cases there are no spots at all on the body, which 

 retains the three dark dorsal lands (var. imviacidata Diirigen). Entirely or nearly 

 entirely black specimens have been described (var. atra F. Miill., vars. nigricans, 

 meJanota Diirigen). 



We thus see tliat ihe evolution of colour-variations proceeds in several directions. 

 Firstly, the light striation, which is so well defined on the dorsal side of the young 

 of the var. exigua, tends to disappear, to be replaced by ocelli, which, without losing 

 the serial arrangement of the white eyes, may beconie irregular or even form cross- 

 hands, as is frequently the case in L. ocellata. Secondly, the dark markings may 

 subsist alone to form the three longitudinal bands which are so often present in 

 L. vivipara and L. mnralis. Thirdly, the dorsal markings entirely disappear (var. 

 rubra), or the lateral band and the ocelli are replaced, as in some males, by a uniform 

 puncticulation, or even the lateral markings are lost (var. iinmaadafa). Black 

 specimens appear to be the result of an invasion of the ground-colour by the black 

 markings, not of a darkening of the ground-colour as in some of the black insular 

 forms of L. mnralis. 



Measurements (in millimetres): — 



1. 2. 3. 4. 5. 6. 7. 8. 



From ond of snout to vent . . 8.5 80 7G CS 08 84 8.S 80 



„ „ fore liml). 30 29 29 2(i 31 28 30 27 



Head 22 li) 18 17 19 18 20 18 



Width of head 15 U lo 12 13 12 11 12 



Deptli of head 1-4 13 13 lU-5 13 11 12 11 



Fore linib 2G 2(; 25 21 29 23 2tJ 21 



Hind liinlj 3G 35 31 30 39 31 38 29 



Foot 21 19 18 15 19 17 19 15 



Tail 130 128 123 115 127 — 137 — 



1. cJ , Lausanne, Switzerland. 2. <?, Hollstei<i, Baden. 3. c?, Transvlvania. 4. (J , Farn- 

 liam, Surrey. 5. ? , Mondorf, Luxemburg. 6. $ , Odensjo, Sweden. 7. ? , Vienna. 8. ? , 

 Swanago, Dorset. 



Contrary to the rule in many species of this genus, but in agreement with the 

 majority of lower vertebrates, females are, on an average, larger than males. 



Particulars of Specimens examined. 



1. 2. 3. 4. 5. 6. 7. 8. 9. 



SwF.nEN. 



?. Odensji; 84 30 29 9 19 12-13 19 2 2 



England. 



cf. Soutliport 73 39 29 9 18 13-14 19 I 1 



G9 37 28 10 18 12-13 19 2-1 2 



r.7 37 29 8 19 14 20 2 2 



f.O 38 27 8 18 13-12 20 1 2 



