216 THE EEPTILES OF EGYPT. 
is pale grey and another rich brown, and both have 30 rows of scales. In tracing 
the typical form of this lizard to the east, one is struck by the increase which it 
manifests in size over those found in Egypt ; and in this respect the Arabian lizards 
also recall those found between Obbia and Berbera, in Somaliland, but they have 
never the thick heavy bodies of var. tiligugu. 
In the British Museum there is a specimen of this lizard from Cyprus decidedly 
referable to forma typica. It has 30 rows of scales, and the coloration is typical, but 
the spots are somewhat less numerous than in Egyptian specimens, and the general 
tint is grey, and in these respects it resembles the Syrian lizards. 
Proceeding to the west of Egypt, two Tripoli examples of this species (British 
Museum) in no way differ in form from those found at Alexandria, and have the highest 
lepidosis, viz. 32 ; but one has the markings of forma typica, and the other those of 
var. tiligugu. At Duirat, on the western frontier of Tripoli, the same form occurs with 
30 and 31 rows of scales and the typical markings. These specimens are probably half- 
grown individuals of the very large lizard found along with them, and which differs 
from typical ocellatus in its much thicker and less rounded body — a feature by which 
this Tripoli lizard is distinctly referable to var. tiligugu. Still further to the west, 
viz. on the road between Biskra and Tuggurt, the lizards are intermediate in the 
form of their bodies between forma typica and tiligugu. In coloration they resemble 
tiligugu, but their scales present all the variations found in Lower Egypt, as they 
range from 28 to 32. Specimens exactly similar to them are found to the north 
at Guelma, on the Tell, and even at Tunis. A specimen collected by M. Lataste 
on the Plain of Sersou has 34 rows of scales round the body, and the dorso-lateral 
pale line well developed, more so than in any of the other specimens, and with 
the brown lateral line spotted with white also present. Indeed, this lizard in its 
coloration is exactly like a lizard from Syracuse in the British Museum. To the 
west of this all the Algerian lizards conform to the tiligugu type, I met with it at 
llammam Meskoutine, where it is common, with 30 rows of scales, and also at 
Hammam R'irha, still further to the west, where it attains to a greater size than in the 
former locality, and has 32 rows of scales. In the Hammam Meskoutine specimen the 
black and white spots are much reduced in number, and along the lower border of the 
pale latero-dorsal line there is a distinct tendency to form a dark brown band below 
it, a feature which is well seen in the young specimen from Guelma, and is indeed 
more or less characteristic of all the Algerian examples, and is very distinctive of 
tiligugu from Malta, Sicily, &c. I have also met with two young individuals at Oran, 
and as far west as Tlemcen, with the coloration of forma typica, but with the lateral 
brown band well developed. Each has 32 rows of scales. In the British Museum a 
young specimen from the island of Lampedusa is coloured exactly like forma typica, 
with only the very faintest indication of a pale lateral line, whilst an older specimen 
