354 Zoological Society. 



1. Sauroceras rhinoceratum. B.M. 



Chameleo rhinoceratus, Gray, Cat. B. M. 267. 

 Hab. Madagascar. A single small specimen. 



13. DlCRANOSAURA. 



Nose of male produced on the sides into two compressed bony 

 horns covered with scales ; of female, simple, hornless. Orbit 

 rounded. Occiput flat above, produced, broad, and rounded bebind, 

 with small scales on its hinder sides. Back compressed, keeled, some- 

 times dentated in front. Chin and belly not toothed. Scales equal. 



1. DlCRANOSAURA BIFURCA. B.M. 



Chameleo bifurcus, Gray, Cat. B. M. 268 ; A. Dum. Arch, du 

 Mus. vi. t. 22. f. 3. 



Chamceleon Brongniartii, Fitz. Syst. Rept. 42. 



Nose-horns elongate ; back dentated in front. Grey (in spirits), 

 with a broad white streak down each side of the belly ; scales equal, 

 Square. 



Hab. Madagascar. Male and female. 



Var. crassicornis. B.M. 



One of the males, with the horns only partly developed, has them 

 very thick and trigonal at the base, so as nearly to reach across the 

 nose. In another young male, about the same size, they are com- 

 pressed and far apart at the base, as in the type specimens. 



2. Dicranosaura Parsonii. B.M. 



Chameleo Parsonii, Gray, Cat. B. M. 264 ; A. Dum. Arcb. du 

 Mus. vi. t. 22. f. 12. 



Chamceleon Parsonii, Fitz. Syst. Rept. 42. 



The nose-horns erect, lobed ; back rounded, not dentated in front. 



Hab. Madagascar. 



There is only a female of this species in the Museum. 



14. Cyneosaura. 



Nose of both sexes flat in front, with the sides dilated, serrated, 

 and covered with large scales. The occiput flat, with a sharp-edged, 

 narrow, central keel above, produced, broad, and rounded behind. 

 Orbit simple. Back compressed, with a series of large compressed 

 scales. Chin and belly dentated. Scales unequal. 



1. Cyneosaura pardalis. B.M. 



Chameleo pardalis, Gray, Cat. B. M. 266 ; A. Dum. Arch, du 

 Mus. vi. t. 22. f. 1 1 (head). 



Bradypodium pardalis, Fitz. Syst. Rept. 43. 



Brown in spirits, with a broad white streak down the middle of 

 the sides. 



Hab, Bourbon ; Madagascar. 



