Shell elongate, subcylindrical, centrally highly ventricose, widi a sharply pointed apex and narrowly rounded base, polished, rimate, smooth in the middle, spirally striated on the terminal portions. Whorls convolute, only the last visible, which is produced to a sharp point above. Sculpture consisting of 7 to 10 subequal, distant striae on the base and a few similar striae on die narrowed portion a little below the summit. Aperture as long as the shell, linear, very narrow above, sharply pointed at the apex, widened and rounded below. Outer lip slightly arcuate, sharp, extending above to the apex, slightly effuse at the base. Inner lip with free margin, extending over the last whorl at the summit. Columella short, oblique, provide3 with a feeble fold. Umbilicus narrow, slit-like.
Occurrence. —Dainiti. Honohasi.
Distribution.—Upper Musasino of Miura and Tokyo.
The specimens under examination have the same general characters as the typical European species except for the columella fold being not so distinctly developed. YAMAKAWA has observed the fossil of the Upper Musasino to be more oval than V. acuminata (BRUGIERE). Prof. YOKOYAMA mentions in his paper that his examples of the Upper Musasino stand intermediate between the typical V. acuminata and its variety brevis, as figured by TRYON in his Manual, and that it is very doubtful whether V. oxyiata BUSH from die coast of North America is really different from the European V. acuminata. According to Mr. MELVILL, V. acuminate lives in the Persian Gulf; he says " species, which I cannot separate from die British and Mediterranean V. acuminata BRUG., which, under various names, seems ubiquitous throughout the Northern Hemisphere, both of the Old and New World."