Shell small, white, barrel-shaped, with the posterior part of the outer lip extending slightly beyond the apex of the shell; form much as in aminea solitaria Say; apex sunken, imperforate, the spire concealed; outer lip partly membranous and contracting in drying, the shell normally covered with a thin periostracum, which in dry- ing splits and contracts; sculpture of close, numerous, spiral rows of emphatic punctations, covering the shell; aperture ample; outer lip thin and submembranous, its posterior extremity rounded over evenly to the suture, the anterior part not expanded; pillar lip thin, arcuate, the margin reflected, forming a gutter just outside the mar- gin; body with little callus, only one whorl visible. Length of young shell, 2.8; maximum diameter, 2.2 mm. Type. Cat. No. 110649, U.S.N.M. In 50 fathoms, off entrance to San Diego Harbor, F. W. Kelsey. The adult is at least three times the length above given. The soft parts do not envelop the shell. The dried animal shows through its translucency the bases of three white gizzard plates which it is im- possible to extract owing to the fragility of the shell. It is possible, however, to see that the plates are long, narrow, straight, parallel sided, and very large for the size of the animal. The plates in Haminea are quite different, so that, notwithstanding the general similarity of the shells, the present species can not be referred to the genus Haminea.