G. A. BOULENGER—REPTILIA. 245 
A single specimen, a gravid female, of this small Chameleon was presented by 
Sir H. H. Johnston to the British Museum in 1901. I had referred it provisionally to 
C. biteniatus Fisch., from which it differs in the coarser scaling and in the much 
longer spine-like tubercles forming the gular-ventral crest, and it was briefly alluded 
to by Mr. J. L. Monk (‘Zoologist,’ 1903, p. 324) as likely to prove a new species, a view 
which is confirmed by the discovery of the male by the Ruwenzori Expedition, in the 
Mubuku Valley, on the east side of the mountain, at an altitude of 10,000 feet. 
[A specimen (no. 24, 2nd Feb., 1906) was found at 10,000 ft., just where the bamboo 
and tree-heath zones meet and intermingle, forming rather more open patchy country. 
This specimen was much smaller than the C. ellioti met with lower down and of a dirty 
grey-green colour. At this altitude (10,000 ft.) the vegetation was sometimes white 
with frost in the early morning. During the time we were encamped there the native 
porters (about 20 in number) were offered rewards for finding Chameleons, but they 
never found but this one, which was sitting on a rotten stump of tree-heath. I fully 
expected this alpine Chameleon to be of a different species to C. ellioti, which is met 
with below 6000 ft., where the climate is hot and tropical—R. B. W.] 
Those who regard C. elliott and C. hoehnelii as races or local varieties of C. biteniatus 
would of course place C. rudis under the same species—and I should be the last to 
blame them, having at one time held the same opinion. 
9. CHAMALEON JOHNSTONI Bler. 
[This Chameleon was obtained only in the Mubuku Valley, E. Ruwenzori, between 
6000 and 7000 feet, and it did not appear to be very plentiful. It is found usually 
among the lower bushes and shrubs just below the forest-line, or in the open spaces 
where native clearings had been made just inside the forest.—R. B. W.] 
10. CHAMHLEON XENORHINUS Bler. 
[This Chameleon was obtained only in the Mubuku Valley, E. Ruwenzori, from 
6000 to 7000 feet, and was found in much the same kind of situations as C. johnstoni, 
but it appeared to be more partial to the larger trees and was found upon the trunks. 
We noticed, too, that this Chameleon when first caught was always of a much darker 
colour than (. johnstoni, almost black, and never became very much lighter. It is not 
improbable that it lives in the large forest-trees, where its presence would be almost 
impossible to detect.—R. B. W.] 
