YAEIETIES OF THE WALL-LIZAED. 177 



as the following tabulation of the two type specimens in Dr. Werner's Collection 

 shows: — 



1. 2. 3. 4. 5. 0. 7. 



c? .... 72 54 26 10 27 25-26 28 

 „ .... 70 53 27 10 28 24 29 



In both specimens the occipital is small and separated from the interparietal. In 

 the larger specimen, figured on PI. XIX. fig. 11, the masseteric disk is small on one 

 side and absent on the other. 



Measurements (in millimetres) : — 



From end of snout to vent 72 



„ „ „ fore limb 30 



Head 19 



Width of head . 12 



Depth of head 10 



Fore limb 25 



Hind limb 37 



Foot 21 



Tail (reproduced) 105 



Vars. CAMPKSTRis De Betta and serpa Raf. 

 What I have said of these two forms a propos of Italy (Tr. 1905, p. 388) applies 

 equally to the East Coast of the Adriatic, where the former passes into the latter from 

 north to south, thus presenting the same difficulty for their sharp distinction, which 

 accounts for the fact that they have been confounded under one name by Bedriaga 

 {L. muralis neapolitana) and by Werner [L. muralis, var. merremii or L. serpa). All 

 the large green Wall-Lizards from the mainland of Istria and most of the islands 

 between Istria and Croatia, are unhesitatingly referable to the var. campestris of 

 De Betta, their habitat being uninterruptedly connected with that of the original 

 specimens (from Venetia) ; in North Dalmatia (Zara) the two varieties occur together, 

 whilst from South Dalmatia (Spalato) and the southern islands of the Adriatic (Cazza, 

 Pelagosa Grande, Pelagosa Piccola), all the specimens I have been able to examine 

 agree with the definition I have given of the var. serpa. The combination of 

 characters (any one of which may exceptionally fail) on which I have based my deter- 

 minations of these easternmost representatives of the two varieties, campestris and 

 serpa, are, for the former as distinguished from the latter, the denticulated collar, the 

 broader and more pointed caudal scales, and, as a rule, a shorter head, larger scales 

 (53 to 62 across the body and 22 to 28 along the throat as against 60 to 78 and 25 

 to 38), and fewer lamellar scales under the fourth toe (25 to 29 as against 27 to 32), 

 and also the relation of the rostral shield to the nostril, as I have mentioned in 



