Shell small, pinkish white, polished, acute, with a flat-topped nucleus of two polished, prominently peripherally keeled whorls and about eight subsequent whorls; suture appressed, with a retractively nodulous, thickened band in front of it, forming the posterior margin of the anal fasciole; sculpture of (on the last whorl 22) somewhat sigmoid rounded ribs with subequal interspaces, reaching from the suture over the whorl to the canal, constricted over the narrow anal fasciole and feebler on the anterior part of the last whorl; these ribs are cut into subnodulous segments by deep narrow sharp spiral grooves, with much wider interspaces, two or three on the spire, nine or ten between the fasciole and the canal on the last whorl; on the canal are five or six coarse close-set threads; aperture (probably not quite mature) rather narrow, anal sulcus narrow, not deep; outer lip thin, sharp, prominently arcuate; inner lip erased; pillar short, twisted, canal short, hardly differentiated. Height of shell. 18.5 mm; height of last whorl, 6.5 mm; diameter, 5 mm.

Kylix turveri: Shell small, with a pointed spire, pinkish-white, shining; nuclear whorls 2, swollen, with a peripheral keel; postnuclear whorls 9; axial sculpture of (on the penultimate whorl 20) strong ribs, with narrower interspaces, lower and curved over the constricted anal fasciole, rising to points at the suture, extending over the base to the siphonal fasciole, obsolete on the last quarter turn; spire with 3 or 4 sharply incised spiral lines between the anal fasciole and the following suture which cut the axial ribs into somewhat rounded segments; base similarly sculptured with 10 incised lines between the periphery and the siphonal fasciole and 4 or 5 cords on the canal; aperture narrow, smooth within, with a very slight varicose hump and a distinct stromboid notch; anal sulcus deep, rounded, with a projecting subsutural callosity; inner lip callous, with the edge reflected; canal short, somewhat recurved. The type measures: length, 19.3 mm.; maximum diameter, 7.4 mm.

The deeply incised spiral sculpture and the closely spaced axial ribbing give a square beaded effect to the sculpture. Length, 19 mm; diameter, 7.4 mm. Tiburon Island to Espiritu Santo Island, Gulf of California, 40 to 70 m.

Gulf of California. Mexico.

Kylix turveri: Mexico. Santa Inez Bay, east coast of Lower California.