90 THE EEPTILES OF EGYPT. 
2. Mariette Bey's house, Sakkara. 
2. Minia. Major R. H. Brown, R.E. 
1. Tel el Amama. Professor W. M. Flinders Petrie, D.C.L. 
1 . Luxor. 
2. Colossi of Memnon, Thebes. 
1. Bocks, banks of Nile, Assuan. 
2. Rocks, banks of Nile, above First Cataract. 
1. Wadi Haifa. Surgeon-Captain R. H. Penton, D.S.O. 
2. Suakin. Colonel Sir Charles Holled Smith, C.B., K.C.M.G. 
4. Houses, Suakin. Henry Barnham, Esq., H.B.M. Consul, Suakin. 
1. Rocks of Dehilba, Suakin plain. 
3. Erkowit, near Suakin. 
6. Houses, Suakin. 
1. Durrur. 
1. Gizeh. Dr. J. C. Mitchell. 
Body short and depressed ; head large, depressed and swollen across the temporal 
region ; snout equalling or slightly shorter than the interval between the eye and the 
ear. A supraorbital bone ; ear crescentic, nearly equalling the diameter of the eye, 
and with a denticulation at its anterior margin of conical scales. Ten or eleven upper 
and lower labials, the last upper labial usually small. Nostril generally defined by 
the rostral, first labial, and three nasals ; rostral much broader than high, with a short 
median groove above ; mental about twice as high as broad, widely separating the 
chin-shields, of which there are generally two or three on each of its sides in contact 
with the labials. Head, from the snout to the occiput, covered with rather large 
convex polygonal scales, among which rounded tubercles occur on the hinder part of 
the occiput and on the temporal region and cheeks. From the occiput backwards to 
the tail and the upper surface of the limbs covered with slightly convex rounded 
granules, with many intermixed large convex or rounded tubercles, those on the trunk 
being arranged in 8 to 10 longitudinal rows, the tubercles on the back being slightly 
less convex than those on the sides. Skin on the cheeks, neck, and sides of the body 
in folds. Scales of under surface flat, hexagonal, imbricate, smooth. Tail shorter 
than the body and head, in broad well-defined verticils, the posterior border of each 
defined by a transverse row of tubercles. Nineteen lamellae on the pollex, twenty-one 
on the hallux, and twenty-two on the fourth digit. 
Colour generally greyish brown, but very variable, depending on the surroundings 
of the lizard, being in some almost black, and in others nearly white. Five dark 
transverse bands across the back, sometimes almost resolved into pairs of spots ; two 
pairs of round equidistant white spots over the shoulder, one behind the other ; head 
occasionally with obscure dusky spots and a dark line through the eye to the sides of 
the neck, uniting with the first dark transverse band ; labials dusky ; under surface 
white or occasionally speckled with dusky on the throat and sides of the belly ; tail 
