114 GARRETT: CATALOGUE OF CYPR^ID^. 



It is very abundant at Swain's Island in Western Poly- 

 nesia. 



Young shells have a single, narrow, sub-median band, a 

 little darker than the ground color. 



30. C. Isabella, L. Occurs in more or less abundance, under 

 stones in sheltered localities, and ranges all through Poly- 

 nesia. They vary considerably in the size of adults ; examples 

 now before me average from 11 to 40 mill, in length, and 

 vary in the ground color. One fine example in my possession 

 is tawny-buff yellow, with the interrupted dorsal lines nearly 



■ obsolete. All are faintly marked with three transverse bands. 



The animal is deep black, with a brown-black mantle, 



which, instead of being garnished with the usual tentacular 



processes, is simply roughened with fleshy granules. The 



short siphon is also without the usual terminal fringe. 



31. C. (Aricia) intermedia, Gray. This species, which is 

 frequently confounded with C. reticulata, Martyn, is never- 

 theless quite distinct. It is more abundant at the Paumotu 

 and Society Islands than elsewhere. In Western Polynesia 

 we detected it at the Kingsmill and Caroline Islands, and 

 found a single specimen at Guam. 



As compared with C. reticulata, they are always smaller, 

 the base whiter, teeth less numerous, and are destitute of 

 the large spot on the face of the shell, which is an essential 

 character in Martyn's species. The young shells invariably 

 exhibit a single, wide, median transverse band, whilst C. reti- 

 culata of the same age shows four narrow bands. 



Usually found under coral on the outer reefs. 



The animal has a tawny foot, shaded above with slate, 

 and the siphon and tentacles of the latter hue. Mantle 

 brownish-slate garnished with small, conical, pale papillae. 



32. C. (Luponia) lynx, L. This common species occurs in 

 shallow water inside the reefs, and, excepting the Marquesas, 



J.C, ii.. April, 1S79 



