Senobolma venusta Okutani, 1964: 135, pl. 8, fig. 1-3; Okutani, 1969: 138, text-fig. 4; Kuroda et a/., 1971: 49, pi. 15, fig. 7; Okutani, 1972: 80, fig. 13, 14.
DIAGNOSIS. A small, tall-spired Bolma with sculpture of smooth spiral cords on surfaces of whorls, short peripheral spines on early spire whorls only, and with a smooth base. The natural-size coloured illustration by Kuroda et al. (1971, pl. 15, fig. 7) shows the colour to be brownish red, with the aperture and base white.
DIMENSIONS. Holotype: height 13.0 mm, diameter 11.0 mm.
TYPE LOCALITY. 34°02.8'N, 138°54.5'E, Zenisu Bank, S.W. of Kozu Is., Izu Ids, Japan, 140-200 m.
TYPES. Holotype, NSMT, with one paratype.
OTHER LOCALITIES. 98 m, S. of Jagoshima, Sagami Bay, Honshu, Japan (Kuroda et a/. 1971, p. 49); seven localities on Zenisu, Hyotanse and Takase Banks, south of the Izu-Shichito Ids, Japan, in 106 to 260 m (Okutani, 1972, p. 80).