1 84 RICINULA. 



Yar. CLATHRATA, Lam. PL 56, figs. 197, 198. 



Brownish white externally, violet within ; the lip and colu- 

 mella whitish, stained and marked with brown. 



Length, l-25-l'75 inches. 



Central Pacific, on coral reefs. 



Yar. LAURENTIANA. Petit. PL 5(i. tig. 1 ( .2. 



This shell, of which only a single individual is known, has the 

 exterior surface covered with a parasitic growth, which obscures 

 its color. Within the mouth it is rose-colored, and the lip and 

 columella are yellowish brown. Length. -S inch. 



Locality unknown. 



Most nearly related to var. spi'dowi . Dunker. 



R. IODOSTOMA, Lesson. PL 50, tig. 199. 



Surface not tuberculate, liglit brownish with incised revolving 

 lines, and four or five dark chocolate bands. Columella with 

 three or four plications ; teeth of outer lip grouped ; aperture- 

 rosy violet within. Length, 1-1 '75 inches. 



Tahiti; 8t*. Ma-cn*xar ; New Zealand. 



Very closely allied to H. horrida; but distinguished by its 

 colored bands and absence of tubercles. 



K, HORRIDA, Lam. PL 56, figs. 201, 202. 



Usually white or very liglit brown; the tubercles or short 

 spines black ; interior deep violet. Length, 1-1-15 inches. 



Philippines to Sandwich hie*. 



R, RIOINUS, Linn. PL 5. lijr. -200 ; pi. 57, figs. 204, 206, 212. 



White or yellowish In-own ; the tubercles or spines black ; 

 aperture white, the lip sometimes tinged with yellow. 



Length, '75-1-25 inches. 



Red Sea ; Benguela, Natal, Guinea, Japan, Philippine*, 



New Zealand, Polynesia. 



Var. ELEGANS. Brod. PL 56, tig. 19:>. 



Varies from the type in the external surface being uniform 

 white, and the lips of the aperture encircled by a narrow brown 

 band. Length, '5--75 inch. Paumotus Isles. 



Mr. Pease remarks of this var. that its variation from the 

 type is parallel to that of R. lobata from R. digitata. 



