APPENDIX. — SNAKES. 241 



Page 10. Add to the diagnosis of Rhabdosoma. 



In one species, loreal shield united with posterior frontal ; 

 scales in one species in thirteen rows. 



Page 11. Rhabdosoma badium. 



c. Adult : fine specimen. Surinam. From M. Parzudaki's 

 Collection. 



Page 11. Rhabdosoma crassicaudatum. 

 c. Adult. New Granada. From M. Parzudaki's Collection. 



Page 11. Add to Rhabdosoma two new species. 



3 a. Rhabdosoma maculatum. 



Upper labials seven, the third and fourth coming into the orbit ; 

 one pair of chin-shields. Scales in seventeen rows. Body rather 

 stout, tail short. Brown or whitish (in spirits) with irregular 

 black transverse spots and bands ; belly uniform yellowish. 



a. Adult. Sine patria. 



b. Adult. Rio Janeiro. Presented by A. Fry, Esq. 



c. Half-grown. Rio Janeiro. Presented by A. Fry, Esq. 



This species is described, p. 204, as Isoscelis maculata, and is 

 placed in the family of the Lycodontidce. I had then only one 

 specimen, the front tooth of which appeared to be much longer 

 and stronger, because the remainder were just in a condition to be 

 changed. The other specimens show that the teeth are not of un- 

 equal length, as is the case in the Lycodontidce ; one specimen 

 even exhibits the middle teeth longer than the anterior and pos- 

 terior ones. The ground colour in one specimen is brown, in the 

 other brownish yellow, and in the third whitish (red in life?). In 

 the half-grown individual, the vertical shield exhibits the lateral 

 edges slightly angularly curved. 



3 b. Rhabdosoma elaps. 



?? Elaps decussatus, Dura. 8f Bibr. p. 1221. 



Upper labials six, the third and fourth coming into the orbit ; 

 one pair of chin-shields. Scales in fifteen rows. Body rather 

 elongate ; tail rather short. Ground-colour yellow ; body and tail 

 encircled by about thirty broad black rings. 



a. Adult. Guayaquil. From Mr. Fraser's Collection. 



Description of the specimen. — This snake has so much the 

 appearance of an Elaps, both in physiognomy and coloration, 

 that, without examining the dentition, one might take it for a 



M 



