404 MR. G. A. BOULENGER ON THE VARIETIES OF 
So Or 
Wepre 5 5 4b 6 5 o 4 aio IO 7 
lore limib:s eam ep sce be ine ae oe Pl mes ECO 22 
Elimdilimib erect) yok Ged te) em anne LO 38 
COM, ol cat Rem aso Age oe! 20 
Tails” elven oc ce), eu RC) ee Peer eels Ommmmilee oO) 
A male specimen is figured on P]. X XVII. fig. 9. 
VI—CORSICA anp SARDINIA. 
(Plates XXII., XXVIII., XXIX.) 
In their Lizards, as in many other animals, Corsica and Sardinia show much in 
common. ‘The presence in the former island, as well as in Elba, of the var. campestris, 
undistinguishable from that of Northern and Middle Italy, points to its former 
connection with these parts of the Peninsula; and I would regard the other varieties 
found in Corsica (quadrilineata and bedriage) as directly derived from the typical form 
of the wall-lizard through the var. brueggemanni. Sardinia appears to have been 
stocked from Corsica, possessing, in addition to the var. guadrilineata, a larger form, the 
true var. ¢iliguerta, which is particularly closely related to the var. bedriage, the latter 
appearing to be nearly completely connected, so far as its characters are concerned, with 
the still more extreme form described by Peraccaas LZ. sardoa. Although owing to its 
general appearance the true ¢iliguerta has usually been confounded with the var. serpa 
of Southern Italy and Sicily, the frequent greater elongation of the parietal shields, 
which, as a rule, do not touch the upper postoculars, is a character which approximates 
it to the var. bedriagw and indicates, in my opinion, closer genetic affinity to the latter 
than to the former. ‘The relationships and distribution of these various forms may be 
expressed by the following diagram :— 
N.W. Italy L. muralis typ. and var. brueggemanna. | 
| 
: 
| var. campestris. 
- | 
| 
Zi | 
acres a A Fe 
Corsica : @ var. bedriage. in 
eo Se var. quadrilineata. 
Sardiviia [ Gee var. surdod. 
Oe ee eee eee var. tiliguerta. 
As mentioned above, the var. bedriage, isolated on the mountains of Corsica (700 to 
1200 metres), finds its nearest allies in some specimens of the var. drueggemanni from 
the Ligurian coast, which, as pointed out by Eimer and by Camerano, are remarkable 
for their strongly depressed head and reticulate markings. 1 have also drawn attention 
