“Tromina tricarinata n.sp., Pl. X, figs. 64, 65
Shell small, dull white, biconic, the body-whorl with three strong spiral keels. Whorls five, including a large, blunt, dome-shaped protoconch of two whorls, the first smooth and almost flat-topped, the -,)nd with numerous fine crisp axial threads and dense microscopic spiral striae. First post-nuclear whorls with a prominent, bluntly rounded, median keel, the penultimate with a second keel emergent the lower suture and the body-whorl with three keels. Outline of shell strongly concave on the shoulder, between the keels and below the lowest keel on the base. Surface delicately reticulated by dense axial and spiral threads. The spirals, which are slightly stronger than the axials, number about fourteen on the shoulder of the body-whorl, five on the rounded keels, nine to eleven between the keels and about thirty below the lowest keel. Spire less than height of aperture plus canal. Aperture produced below into a short open spout-like canal. Outer lip thin, columella strongly incurved above and spirally flexed below. Operculum small, occupying about half the area of the aperture, ovate, thin, horny and paucispiral, the nucleus subterminal and on the inner side.
Height 13.5 mm.; diameter 8.5 mm.
TYPE LOCALITY. St. 170. Off Cape Bowles, Clarence Is., 61° 25' 30" S, 53° 46' W, 23 Nov. 1927, 342 m.
DENTITION. Fig. L, 71, p. 194.”
(Powell, 1951: 135)
Falsitromina tricarinata is a species of sea snail, a marine gastropod mollusk in the family Cominellidae.[1]
Falsitromina tricarinata is a species of sea snail, a marine gastropod mollusk in the family Cominellidae.
