34fi PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxx. 



about sixteen of which appi^ar on the fourth, eig-hteen on the eig-hth, 

 and twenty-two on the penultimate whorl. At irregular intervals sev- 

 eral of these ribs are fused and enlarged to form a varix, five of which 

 are present on this shell. Intercostal spaces about as wide as the ribs, 

 marked bv seven moderately l)road, incised, spiral lines betw^een the 

 sutures; the posterior one of these is at some little distance l)elow 

 the suuunit. These lines are sube(iually spaced and of al)out the 

 same width, except the last one, which is about twice as broad as the 

 others and marks the periphery with a series of rectangular pits. The 

 elevatf^d spaces between the incised lines pass over the axial ribs and 

 render them faintly nodulose. The spaces inclosed lietween the first 

 and second, fourth and fifth, and sixth and seventh spiral lines are a 

 little more (elevated than the rest and hence appear as stronger nodes 

 on the ribs. Periphery of the last whorl angulated. Base short, mod- 

 erately rounded, marked by the feeble continuation of the axial ribs, 

 which hardly extend to the umbilical region, and eight well-incised 

 sulxMiually spaced, wavy, spiral lines, the raised area between the ante- 

 rior one of these and the series of pits at the suture is like the raised 

 spaces between the incised lines between the sutures; the rest appear 

 as mere wavy raised threads. Aperture subquadrate, posterior angle 

 obtuse, outer lip showing the external sculpture within; columella 

 straiglit, twisted, without tipparent fold, parietal wall covered by a 

 til in callus. Columella l)rown; this color tinges the adjacent area, 

 fading out altogether on the middle of the base. 



Dunker's type, the specimen here described and figured, comes from 

 Desima, Japan. It has fourteen postuuclear whorls and measures: 

 long. '.>.(*) nun.; diam. 2.2 mm. 



TURBONILLA (LANCELLA) BELLA, new species. 



Plate XXII, fig. 6. 



Shell elongate-conic, slender, vitreous to milk-white. Nuclear whorls 

 three, large, helicoid, considerably elevated, smooth, having their axis 

 almost at a right angle to the axis of the later whorls. Post-nuclear 

 whoils (piitc high between the sutures, well rounded, with a mere indi- 

 cation of a shoulder at the summit, ornanu>nted by moderately strong, 

 rounded axial ril)s, a])out eighteen of which occur upon the second, 

 twenty on the tifth, and twenty-eight upon the penultimate whorl. 

 Intercostal spaces about two-thirds the width of the ribs. The spiral 

 sculpture between the sutures consists of equal and subequally 

 spaced alternate raised and depressed areas, both of which pass over 

 the axial ribs and lend them a subnodulose aspect; eight of these areas 

 ai)pear on the third, nine u|)on the tifth. and eleven upon the penulti- 

 mate whorl. In addition to the above-described sculpture, seven 

 irregularly distrit)uted varices are present, which consist of several 

 enlarged and fused axial ribs. The tirst one of these appears on the 



