370 ME. G. A. BOTJLENGEE ON THE VAEIETIES OF 



Since this paper was written Hr. Lor'enz Miiller has reported (Zool. Anz. 1905, 

 p. 502) the occurrence of the var. cettii (= tiliguerta) at Binisaida, S.E. coast of 

 Minorca, and he has kindly sent me one of his specimens, which agrees entirely with 

 the Sardinian var. tiliguerta. Whether these lizards are really indigenous or were 

 introduced by human agency is a question which Hr. Miiller himself has suggested for 

 consideration, but which cannot at present be solved. 



Var. PITYUSENSIS. 



Lacerta muralis, var. balearica Bosc;C, An. Soc. Espan. H. N. xii. 1883, p. 245. 



Lacerta muralis, var. pityusensis Bosca, 1. c. p. 246. 



Lacerta muralis balearica, var. pityusensis Bedriaga, Abh. Senck. Ges. xiv. 1886, p. 254. 



Head (PI. XXVI. fig. 1 a) once and a half to once and two-thirds as long as broad, 

 moderately depressed, its depth in the tympanic region equalling the distance between 

 the anterior border or the centre of the eye and the anterior border of the tympanum ; 

 snout rather pointed. Neck as broad as or a little broader than the head. Body mode- 

 rately depressed. Hind limb reaching the shoulder or the collar in the males, the 

 shoulder, the axil, or the elbow of the adpressed fore limb in the females ; foot as long 

 as or a little longer than the head. Tail once and a half to a little over twice the 

 length of head and body, rounded in section, cyclotetragonal at the base. 



Rostral shield entering the nostril, often largely ; nasals forming a suture behind the 

 rostral, separated from the anterior loreal by the postnasal, which is usually single l . 

 Frontal as long as or shorter than its distance from the end of the snout ; a series of 

 o-ranules between the supraciliaries and the principal supraoculars 2 , the first or first 

 and second of which are usually in contact with the first supraciliary. Occipital usually 

 as Ion 0, as and broader than the interparietal, sometimes much smaller. Parietals once 

 and one-third to once and two-thirds as long as broad, in contact with the upper post- 

 ocular. Upper temporal shield entirely absent or broken up into a series of small 

 shields. Temple covered with granular scales ; tympanic and masseteric shields distinct, 

 the latter separated from the parietal by from one to three series of scales. Four upper 

 labials anterior to the subocular 3 . 



26 to 34 scales and granules on a line between the symphysis of the anterior chin- 

 shields and the median collar-plate ; gular fold distinct ; collar even-edged, formed 

 usually of rather small plates, 9 to 14 in number. 



1 Two postnasals on the left side in two of the specimens in the British Museum, two on both sides in a 

 specimen in the Madrid Museum. 



- These granules are reduced to a few in one of the specimens in the British Museum and in four in the 

 Madrid Museum. 



3 Five on one side in two specimens, on both sides in one. 



