3g Art. — M. Yokoyama : 



tliem below the shoulder, one of which is close to it and the other 

 near the lower suture. Besides the grooves, there are also very 

 fine impressed spiral lines on other parts of the whorls. Body- 

 whorl somewhat higher than the spire, convex (the shoulder indis- 

 tinct) and furnished with more than ten grooves l>elow the two 

 above mentioned, their breadth gradually growing as they get 

 downward. Aperture longly oval, pointed behind. Inner lip 

 Avith a thin callus, distinctl}' bounded toward outside and with a 

 faint indication of an oblique fold. Outer lip thin, with a wide 

 and shallow notch at a little distance from the suture. Height 17 

 millim. Diameter 6 millim. 



This shell is not nnlike the one described as OUgotoma pannus 

 (Basterot) (Harmer, Plioc. Moll. Grt. Brir., 11, Pal. Soc, vol. LX- 

 VIII, p. 215, pi. XXVII, figs. 8-11) from the Enghsh Crag and 

 also from the French and Italian Miocene, but the whorls in the 

 latter are nearl}^ flat, with a columellar fold on the inner lip. 



Fossil occurrence. — Otake (only a single specimen). There is 

 a specimen (fig. 28) from Semata, Shito showing a similar sculp- 

 ture, but more slender in form. It maj^ possibly be oi\\y a variety 

 to which I intend to give the liame of var. sematensis, if it should 

 prove hereafter to be such. 



31. Crenofia oyuratia, Yokoyama. 

 PI. I. Fig. 29. 



Shell moderately thick, fusiform. Whorls about seven and a 

 half, the first two embr3^onal, smooth and rounded, the remaining 

 somewhat concave on the upper half and slightly convex on 

 the lower, and ornamented with longitudinal as well as with 

 spiral sculptures. The longitudinal scmlpture consists of plicae 

 l:>ent in the middle with the concave side toward the front; these 

 plicae are about twenty-seven in number on the penultimate whorl, 

 broad and obtuse, not quite equidistant and more or less unequal,^ 

 though generally wider than the interspaces, and on the last two 

 Avhorls interrupted by a concave surface below the suture. The 

 spiral sculpture is divisible into striae and sulci., the former being 



