Vol. XVI, pp. 61-62 May 6, 1903 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW SPECIES OF CHAMAELEON. 



BY THOMAS BARBOUR. 



An examination of the large collection of Chamaeleons in the 

 Museum at Cambridge, Mass. discloses two species apparently 

 hitherto undescribed. Remarks on their characters follow. 



Chamaeleo angusticoronatus n. sp. 



Near Chamaello dilepis, but differing in the peculiar narrowness of the 

 casque, the squamation of the body and the prominence of the dorsal 

 tubercular crest. 



Specific characters. — Casque well raised posteriori}'; the lateral crests 

 decidedly marked from their origin on the snout to a point about half- 

 way from the eye to the extremity of the casque; at this position they 

 quickly become indistinct and disappear. Above the casque narrows 

 suddenly to a very acute point, beginning to show the compression just 

 where the lateral crests vanish. The surface of the body is very finely 

 granular, and the dorsal crest is hardly noticeable except for a short 

 distance directly behind the casque. The tail is slightly longer than the 

 head and body. 



Type. — An adult female from Zanzibar, No. 6712, of the Reptilian 

 Collection in the Museum of Comparative Zoology. 



Measurements. — Total length, 226 mm.; length of mandible, 24 mm.; 

 tip of snout to extremity of casque, 33 mm.; greatest width between 

 lateral cranial crest, 13 mm.; width of head, 18 mm.; depth of skull, in- 

 cluding mandible. 27 mm. ; length of head and body, 110 mm. : length of 

 tibia, 21 mm.; length of tail, 116 mm. 



19— Proc. Biol. Soc. Wash. Vol. XVI, 1903. (61) 



