Shell small, about 6 mm. in length, thin but strong, conical, expanding gradually from the top to the margin, the height varying from .50% to 80% of the length. The anterior half of the shell has straight or slightly convex sides; the posterior half, slightly concave sides. Base broadly ovate. Apical whorls from one and one quarter to one and one half, smooth, glossy, slightly projecting upwards. They lie immediately behind the orifice, to the right of the shell, but since the axis about which they coil is not at right angles to the anterior-posterior axis of the shell, but is turned to the right, the whorls lie obliquely on the posterior slope. The orifice is rather short, pear shaped, sometimes occupying an almost horizontal position at the top of the shell. Sculpture very fine consisting of numerous radiating riblets starting around the orifice, intermediate ones being intercalated lower down. These riblets are beaded by numerous granules formed at the intersection of fine, closely-set threads with the riblets, giving the shell a granular appearance. Margin smooth in adults and very finely crenulated in young specimens. Interior of shell highly polished and glossy, extending deeply into the apical whorls. Internal septum is a Hat shelf reaching from one side of the shell to the other and extending downwards for about a third of the distance from apex to base.

P. profundi is a deep sea species, with a wide distribution. Dall (1927, p. Ill) described multifila from the Western Atlantic as a variety of profundi on the following basis: "the radial sculpture alternates stronger and weaker and is more or less granulated by incremental lines." In the Western Atlantic we find typical specimens along with others which have the radiating ribs more widely spaced, the intermediate riblets proportionally finer and the concentric threads almost invisible in the spaces between the ribs and riblets, while the concentric lines of growth are very distinct. All other characters are the same in both forms, and Inning found intermediate forms that merge one into the other, we conclude that the specimens with a lighter and more widely-spaced sculpture cannot possibly be considered to constitute a good variety. The differences referred to above are quite common among the species of Puncturella: P. noachina is a good case in point. See Remarks under P. agger and P. circularis.

Range. EASTERN ATLANTIC: from the Bay of Biscay to northwestern .Africa and the Azores. WESTERN ATLANTIC: from Cape Farewell, Greenland, south along the West Indies and the coast of Mexico and Central America.
Records. WESTERN ATLANTIC: GREENLAND: off Cape Farewell, Valorous, station 12 in 1450 fathoms (Jeffreys 1877). GEORGIA: off Cumberland Id., Albatross, station 2668 in 294 fathoms. FLORIDA: off Fernandina, Albatross, station 2415 in 440 fathoms. LESSERANTILI.ES: off Culebra Island, Challenger, station 24 in 390 fathoms (Jeffreys 1883 and Watson 1883).