AGAMA. 93 
Mr. Blanford pointed out, in 1876 1 , that the last-mentioned species is the Persian 
form, distinct from what he designated as the Egyptian lizard, which he held would 
stand as Trapelus mutabilis, Merr. From Mr. Blanford's allusion to certain characters 
of the lizard he had in view, it would appear to have been A. pallida, and not 
VAgame variable of Is. Geoffroy, which seems to be identical with A. inermis, Reuss. 
Mr. Boulenger, in preparing the second edition of the British Museum ' Catalogue 
of Lizards,' had to deal with Sir J. G. Wilkinson's specimen ; and not being able to 
identify it with any known species, he described it as new under the name A. latastii. 
I captured in the neighbourhood of the Pyramids of Gizeh a lizard distinctly referable 
to A, latastii '. Mr. Boulenger describes the scales "as equal, rhomboidal, imbricate, 
smooth or indistinctly keeled .... the size of which scarcely exceeds that of the 
ventrals," and the back of the head as having no spinose scales. The upper edge of 
the ear, however, he mentions has a fringe of 3 or 4 pointed scales. In the Gizeh 
specimen (PI. IX. fig. 3) corresponding to A. latastii the fringe on one side of the 
head has the scales so small and so little pointed that they are only just visible to 
the naked eye. 
These two specimens appear to me to correspond to A. mutabilis, Merr. They are 
both females, and I believe them to be inseparable from the lizard described by Reuss 
as A. inermis. I have arrived at this conclusion after having compared them with a 
male lizard captured at Gizeh, and submitted to Prof. Boettger for comparison with 
the types of A. inermis preserved at Frankfort. He pronounced it to be specifically 
identical with A. inermis, but since then I have been enabled, thanks to his courtesy, 
to compare them myself, and I have come to the same conclusion. The individual 
compared with the type at Frankfort is represented by fig. 1, PI. IX. I have also 
examined the types (two males) of A. gularis, Reuss, both of which are specifically 
identical with A. inermis, an opinion which is also held by Professor Boettger. 
In the two females { — A. latastii) to which I am specially referring the body-scales 
are small, rhomboidal, imbricate, nearly equal, smooth or feebly keeled, with a few 
faintly enlarged, obtusely keeled scales scattered sparsely among the small scales ; 
whereas in the types of A. inermis, corresponding to fig. 1, PI. IX., the scales are more 
unequal and more sharply carinate. The inequality is such that some of the scales are 
distinctly larger than the others, strongly keeled, and irregularly scattered among them. 
These larger scales, however, are foreshadowed by the faintly enlarged scales observed 
here and there, but very feebly developed, in the two females of A. latastii. Beyond 
these trivial differences there is not a single character by which they can be separated. 
The finest form of lepidosis is that illustrated by the two females which I consider 
can be reasonably regarded as examples of A. mutabilis, Merrem. The next modi- 
fication is met with in those lizards from Gizeh which come under Reuss's description 
of A. inermis. There are, however, further instances of variation, in which the scales 
1 East. Persia, Geol. & Zool. ii. 1876, p. 316 ; Journ. As. Soc. Beng. xlv. pt. ii. 1876, p. 23. 
