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. 



3a. 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 LycodontidcB. 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 LycodontidcB ; 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, Dum. Sf 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. Eraser'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 



