i:i riJBA. 



rounded; the edge line ia convex, and rei ipidly in front, 



where the shell IS abruptly truncate. 'r"|> very Muntlv rounded. 



the apex being to some extent enveloped in tin- succi--din^ whorl, 



which rises slightly above it. Inner lip: a thick pud <>l irla/.e, with 

 Well-defined ed^e, extend- <lown tlic sliirhtly convex body, and 

 passes with gradual sweep into the twisted suhconcave pillar which 

 is truncate in front; at the top of the pillar the L r la/c is much thick- 

 ened, and presents for a short distance two very oblique twisted 

 parallel folds, which are parted by a small furrow; another furrow 

 lies outside, between the exterior fold and the glaze edge. Alt. 0'& 

 in. diam. (H4. Mouth, height 025, breadth 0'03 inch. ( Wats.). 



North of Cidebra 1., W. Indies, 390 fins. 



Utr leu/ a* tpatha WATS., J. L. S. L. xvii, p. 333; Chall. Rep. 

 Gastr. p. 649, pi. 48, f. 7. 



This exceedingly peculiar form in many respects recalls, rather 

 than a Utrlculus, one of the long narrow low-spired Marginellas, 

 such as Marginella nemllii Jouss., or Mari/hiella avena Kien. 

 (Wats.-). 



R. MAYOI Dall. 



Shell solid, white, with a yellowish polished epidermis and well 

 marked lines of growth, spiral strife very faint and few, or none ; 

 whorls 3-1-4, spire distinct, little elevated, nucleus small, rounded, 

 not prominent, aperture long, rather wide and straight, the posterior 

 commissure rounded, the anterior wide, the margin spirally curved 

 showing the axis (though this is not pervious) ; umbilical-chink 

 none, pillar broad, white, oblique without any trace of a plication : 

 outer lip thin, arched forward in the middle ; suture very deep ; 

 inner lip with a wash of callus. Lon. of shell, 8*3; of aperture, 

 7-0; max. lat. 4-6 mill. (/*///. 



Portl'uxl, Mnint'. from tish stomach M: 



Utriculus mayoi D.U.F.. IJlake < Ju-tr.. p. pi. 



This shell recalls Bulln tnn-lfn M< Her, hut is much larger, with 

 proportionately shorter spire, straighter sides and more \\idth ante- 

 riorly. (Dal/]. 



R. ri:n i.KiDall. PI. -J1, fig. 8. 



Shell rather large, solid, polished opaque white, l>rao!er hchind 

 than before its middle: apex perforate, around which the margin of 



