182 RICINULA. 



suture impressed ; body-whorl large, ventricose, and marked with 

 coarse, remote, revolving impressed lines, and fine longitudinal 

 striae and wrinkles ; canal short, slightly recurved ; aperture 

 oblong-ovate ; outer lip thick, somewhat dilated, and furnished 

 with six or seven intra-marginal tubercular teeth, sinuated at its 

 junction with the body -whorl ; columella-lip smooth, flattened, 

 slightly callous above. Color black or brownish black, impressed 

 lines on body-whorl light chocolate-color: lip purplish-brown; 

 teeth white or bluish. 



Animal. Foot oblong, truncated in front, rounded behind ; 

 tentacles cylindrically tapering. Eyes lateral and sessile, at 

 about two-thirds of the length of the tentacles ; siphon long. 

 Color dark greenish slate, closely punctured with black and 

 white ; tentacles zoned with brown, tips white. 



Sandwich Isles (Pease) ; 8oloinon''s Isles ( Brazier i. 



V. CINGULATA, Gould. 



Shell small, thick, ovate-turreted, smooth, brownish I'ed alter- 

 nately zoned with yellow, stride intercurrent ; whorls seven, some- 

 what convex, the apical granular, the last large ; aperture nar- 

 rowl}^ ovate ; lip oblique, with seven teeth, and fasciated within ; 

 columella excavated, red. Length 12, diam. 6 mill. 



Ousima, Japan, under stones at low water. 



Described as a Planaxis, which it may well be, and as likely 

 to be a Pisania as a Vexilla. 



aenus RICINULA, Lam. 



H. and A. Adams restrict the typical group to those species 

 having spinose or tubercular whorls, with digitate outer lip ; and 

 they practicall}' ihclude in it a few species distinguished for size. 

 The teeth within the outer lip are generally disposed into an 

 upper and a middle compound tooth, besides single, inferiorly 

 placed ones. The subgenus Sistrmn has usuall}" a longer spire, 

 the shell is smaller, more fusiform, the teeth within the outer lip 

 not grouped, but single. This separation has its conveniences, 

 and I adopt it : nevertheless the characters, as in so many other 

 o-roups, only serve well for the recognition of some of the forms ; 

 others must be arbitrarily placed. The dividing line between 

 Sistrum and Engina, Latirus and some Pisanoid forms is very 



