230 THE EEPTILES OF EGYPT. 
I was enabled to compare it in London with one of the types of C. calyptratus preserved 
in the Paris Museum. Fig. 8 (p. 229) represents the head and shoulders of the 
latter specimen of the size of nature, and if it be compared with the life-sized figure 
of the Yemen male (Plate XXX.) it will be seen that the only difference between the 
two lies in the slightly lesser development of the crest in the type, which, however, 
is sufficiently explained by the fact that it is a female. There is no other feature 
of any importance in which they differ. 
M. Mocquard, some years ago l , was disposed to regard the type specimens 
of C. calyptratus as females of C. calcarifer, Peters, but more recently 2 he has 
acquiesced in Mr. Boulenger's opinion that the two are quite distinct species, and has 
pointed out that, as there is also a specimen from Yemen in the Paris Museum, the 
two species exist side by side in Arabia, which is further verified by the Cairo male 
from the same region. 
I am, however, not quite satisfied that, with larger materials, the differences that 
now are supposed to separate C. calcarifer from C. calyptratus may not eventually 
break down. If, however, they should not, then the two, as now, must be regarded 
as very closely allied species 3 . 
Chameleon basiliscus, Cope. (Plate XXXI.) 
? Chammleo africanus, Laur. Syn. Rept. 1768, p. 46. 
Chamceleon vulgaris, part., Gray, Cat. Liz. B. M. 1845, p. 265 ; part., Troc. Zool. Soc. 1864, p. 469; 
Biippell, Mus. Senck. iii. 1845, p. 299; part., A. Dum. Cat. Rept. Paris Mus. 1851, p. 31 ; 
part., Schreib. Herp. Europ. 1875, p. 496, fig. 97 ; Gasco, Viagg. Egitto, pt. ii. 1876, p. 105. 
? Chammleo vulgaris, Lefebvre, Abyss, vi. Zool. 1845-50, p. 193 ; Del Prato, Atti Soc. Ital. Sc. 
Nat. xxxv. 1895, p. 25. 
Chamcsleon basiliscus, Cope, Proc. Ac. Philad. 1868, p. 316 ; Blgr. Cat. Liz. B. M. iii. 1887, p. 446, 
pi. xxxix. fig. 3 ; Aim. Mus. Civ. Genova, ser. 2, xvi. (xxxvi.) 1896, p. 552 ; Boettger, Kat. 
Rept. Mus. Senck. 1893, p. 118; Anderson, Herpet. Arabia & Egypt, 1896, p. 106. 
Chamcelio Imvigatus (non Gray), Blanford, Geol. & Zool. Abyss. 1870, pp. 128, 445. 
2 cJ, 1 juv., and 1 juv. ? . Ramleh. 
1 ? . Tokar. Major H. W. Jackson. 
1 $ , 3 9, and 1 juv. Suakin. 
1 J and 1 juv. Wadi Haifa. Surgeon-Captain It. H. Penton, D.S.O. 
Casque moderate, elevated posteriorly, with a slight anterior convexity, but nearly 
vertical posteriorly ; no dermal occipital lobes ; supraorbital ridge strong, prolonged on 
1 C. R. Soc. Philom. no. 19, 1893, p. 5, footnote. 
2 Op. ait. no. 12, 1895, p. 36. 
3 Herpet. Arabia & Egypt, 1896, p. 62. 
