220 Barboui — A Neio Race of Chameleons from British East Africa. 



Upper head scales, flat, polygonal, very irregular in size, eight rows 

 between the superciliary borders (six are mentioned by Werner, 1911, p. 

 38, for C. tenuis tenuis). Body scales distributed in irregular horizontal 

 series, each two or three tubercles wide, and separated from one another 

 by minute scales; these lateral tubercles are homogeneous in size, flat but 

 of somewhat irregular outline. No occipital lobes. 



Only a few slightly enlarged tubercles along the mid-dorsal line; other- 

 wise no dorsal crest. Neither gular nor ventral crest. 



Limbs long and slender. Tail much longer than head and body, 

 strongly compressed. A single enlarged tubercle in the middle of the 

 posterior border of the casque, where the lateral crests meet. 



Type No. 7828, Reptile Collection, Museum of Comparative Zoology, 

 adult female from the Mweru District, north of Mt. Kenia, British East 

 Africa, W. R. Zappey, collector. 



It is unfortunately necessary to describe this new form from the female 

 alone. The male of the German East African species bears an elaborate 

 rostral appendage, described by Werner. This, of course, is absent in 

 the female, though it is to be presumed that the male of this new race is 

 provided with a somewhat similar outgrowth. 



The total length of the type is 176 mm., 8 mm. longer than the largest 

 male of C. tenuis tenuis, and 38 mm. longer than the largest female. 

 This character, together with the other more important ones seen in 

 casque form and squamation would seem to indicate a strongly marked 

 geographical race as occurring sparingly in the region north of Mt. 

 Kenia. 



