Lacerta. 51 



specimens from Bosnia, a condition apparently unknown to him 

 in the typical form. In his notes on L. agilis from Bosnia and 

 Herzegovina, Werner mentions that out of 38 cases examined one 

 postnasal aud one anterior loreal occurs 25 times ; in 6 cases 

 there are one postnasal and two superposed anterior loreals, in 2 

 cases two postnasals and two anterior loreals, in 3 two postnasals 

 and no anterior loreal, and in 2 one postnasal and no anterior loreal. 

 One postnasal and one anterior loreal — a combination which is very 

 exceptional in the typical form aud never occurs in the var. exigua — 

 is therefore the rule in this variety. 



The two specimens examined by me are here tabulated : 



The number of scales is below the average in the typical form, the 

 dorsal scales are not abruptly diiferentiated from the dorso-laterals, 

 and Werner refers to the large size of the outer ventral plates — a 

 character, however, not shown by the specimens before me — to the low 

 number of gular scales (13 to 16) and of femoral pores (11 to 13). 

 In one of his specimens the occipital is absent aud the rostral is in 

 contact with the frontonasal. 



Otherwise the proportions and the lepidosis are as in the typical 

 form, and so is the coloration except for the median light spots being 

 confluent to form a vertebral streak (var. spinalis of Werner), which, 

 accordmg to Schreiber, is but exceptionally interrupted. 



Some specimens are said to have the back uniform red or reddish 

 brown, without any markings, like some of the typical form and of 

 the following variety. 



Schreiber regarded the Bosnian lizard as more nearly related to the 

 var. exigua, to which it has actually been referred by Boettger (Katal. 

 Kept. Mus. Senckenb. i, p. 82). 



Habitat. — Dinaric Alps (up to 2000 m.), Mountains of Bosnia and 

 Herzegovina (up to 1500 m.), and probably Bulgaria. 



Var. CHERSONENSIS. 



Lacerta chersonensis, Andrzejewski, N. Mem. Soc. Nat. Mosc. (2) 

 ii, 1832, p. 327. 



Lacerta viridis, var. n, Schreib. Herp. Eur. p. 434 (1875). 



Lacerta agilis, var., Kiritzescu, Bui. Soc. Sc. Bucur. x, 1901, 

 p. 308. 



