230 BULLETIN OF THE 



other. At all events, it can do no harm to retain the name in the manner I 

 have done until more extensive material can be studied, and in this way pre- 

 vent the distinction from being lost sight of. 



One young specimen measures 39 by 25.5 mm., but the outer lip is not perfect. 

 An adult measures 37.5 by 27.0 mm., the last whorl being 30.0 mm. long. The 

 soft parts were lost from all the specimens. The nucleus was as in 0. sulcata, 

 and there were six whorls. In all respects not noted, the shell was extremely 

 like 0. sulcata. The outer lip was obscurely lirate, or rippled, within. 



I am uncertain whether the following group should be referred to this 

 family, or to the vicinity of Liomesus. 



DALIUM n. g. 



Shell solid, spirally sculptured, short-fusiform, with an unexpanded aperture, 

 outer lip thickened, simple ; body whorl smooth with a well marked smooth 

 callus; nucleus not differentiated; pillar twisted, simple, shorter than the 

 aperture; canal short, obliquely truncate, nearly straight, not deeply notched. 



This shell recalls Doliurn or Sconsia in its sculpture and texture, but is 

 heavy and solid, has a much more produced spire, and a different outer lip and 

 columella; it is perhaps most like Lagena, but without plaits on the pillar, lirse, 

 or teeth on the outer lip; its relations are probably in this direction, or with 

 Liomesus. It bears some resemblance to Liomesus, especially to such forms as 

 L. canaliculars Dall, but the unexpanded aperture, the marginated suture, 

 the facies of the shell, and its habitat are rather against this allocation. In the 

 absence of the soft parts and operculum its systematic position cannot be 

 determined. The type is 



Dalium solidum n. s. 



Plate XIX. Fig. 10 d. 



Shell heavy, solid, porcellanous, six-whorled, with a rather obtusely pointed 

 spire ; suture inconspicuous, njarginated by the sculpture, slightly channelled; 

 nucleus minute, smooth; shell sculpture consisting, first, of transverse ruga?, 

 due almost wholly to irregularities of growth and evanescent or absent on the 

 nucleus; secondly, of spiral ridges with channelled interspaces, of which four 

 narrow ridges with about equal interspaces are found immediately in front of 

 the sutural margin; these are separated from a single narrow thread in front of 

 them by a broad shallow channel about equal in width to two of the preceding 

 narrow ridges and their attendant interspaces; before these again lie (on the 

 last whorl) about twenty-five broad flat-topped ridges separated by channels 

 of less than half their width, the whole very uniform, though as usual a little 

 coarser near and on the pillar; aperture rather small, attenuated anteriorly, 

 pointed behind, with a short, wide, nearly straight canal in front; outer lip 



