LACERTA MURALIS IN WESTERN EUROPE AND NORTH AFRICA. 387 
form, very strongly defined and forming nearly complete annuli, separated by brown 
interspaces ; the regenerated portion, as in all Wall-Lizards, with black and light 
longitudinal streaks, strikingly contrasting with the annular markings of the 
primary tail. 
The markings are the same in the young as in the adult. 
Male specimens from Rome are figured on Pl. XXII. figs. 4-6, and a young one on 
text-fig. 6d, p. 399. 
Replying to my enquiries respecting the distribution of Z. muralis typica and 
var. brueggemanni in Italy, my friend Count Peracca kindly informs me that he 
received alive, many years ago, a lizard, apparently answering to the var. brueygemanii, 
from Naples, which specimen has appeared in Camerano’s list, but has since been 
mislaid!. He has since made many excursions about Naples without rediscovering 
such a variety, nor has he found any other than the serpa or neapolitana variety south 
of Naples, even at altitudes of 1000 metres or above. In Liguria he found the 
var. brueggemanni, with lemon-yellow or green back, only near the sea; on the hills, 
from 100 metres upwards, only the ordinary grey-brown typical form. In the Arno 
Valley the var. brueggemanni follows the plain which extends inland rather far from 
the sea, and it even penetrates as far up as Florence, where, however, specimens inter- 
mediate between it and the typical form occur. 
Much remains to be done in ascertaining the exact range of the typical form, the 
var. brueggemanni, and the var. nigriventris in Italy, and how far the three are capable 
of satisfactory definition. My own impression is that the first two intermix, in 
Liguria at least, where the southern and northern forms meet in the same localities, 
and that the same will be found to be the case between the second and third forms 
when we come to know more of the lizards occurring between Florence and 
Rome. 
It has often been stated that the serpa or neapolitana form can be readily distin- 
guished from the typical form by the shape of the head and the general proportions. 
How vague these differences are in most cases is well shown by these large lizards of 
the nigriventris variety, referred by some to the typical form, by others to the 
“neapolitana” form. And the resemblance to the latter is emphasised by a com- 
parison with the black Filfola lizard, which is regarded as derived from the Maltese 
“neapolitana.” And yet there can be no doubt that the var. nigriventris is only an 
exaggeration of the var. drueggemanni, which is itself completely connected with the 
typical form of Northern Italy and Central Europe. As often happens in these lizards, 
the var. nigriventris has acquired with its larger size a finer scaling, which approaches 
* As noticed above, a specimen from Mount Meta, not far from the Province of Naples, has been sent to me 
on loan by Prof. Monticelli. : 
