Shell small, subglobose, spire forming a short, subgradate cone; umbilicate, whitish-yellow, with a slight nacreous lustre. Whorls about 6, of which about one forms the blunt, smooth nucleus; the next whorls, including the penultimate, have only one strong median keel, the space above and below this keel is slightly concave, with a few microscopic spiral threadlike striae; two whorls next to the nucleus are crossed by conspicuous radiating riblets, straight but in an oblique direction above the keel, convex below it, these riblets then suddenly disappear,only very fine striae succeeding them, being scarcely perceptible on the last whorl, witch is bicarinate; a third keel borders the flattened base; suture rather conspicuous but shallow, with very slight traces of being margined, probably by the covered keel; base with 7 spirals of which the distal one, separated from the third keel by a slightly concave space, and one bordering the umbilicus are stronger; moreover the whole base is covered with microscopic radiating striae, beautifully waved in an S-like manner. Umbilicus moderately wide, pervious, funnel-shaped, its wall wave-striated, with a shallow spiral groove terminated by a tooth on the columella. Aperture irregularly subquadrate, its outer margin so much broken, that no sinus remains, it is strongly sinuous by the terminations of the keels, of which the upper one becomes double at a little distance from the mouth, columellar margin connected to the outer one, by a thin layer of enamel on the body-whorl, it is first strongly excavated above by a rather deep sinus, reaching the columellar tooth, below this tooth it is again concave and terminates in an angle when it joins the basal margin at the point terminating the umbilical keel. Alt. 3 mm, lat. 3,5 mm; apert. alt. 1,85 mm, lat. 1,4 mm. diam. of umbilicus about 1 mm. These measurements will be more or less altered in a specimen with complete aperture.

Q. sykesi has some resemblance with S. elegans Jeffr. but differs sufficiently by the number of keels and by the aperture, which, though broken, has other characters, the columella in elegans being much longer than it can be in a complete specimen Q. sykesi, the whole shape of S. elegans is consequently more obliquely elongate, the sculpture is much less developed in the new species. It has also resemblance with S. polita Verco), especially in its sculpture, but that species, according to Verco is only rímate and the keels are blunt and placed in a different manner. The nearest ally is S. ionica Wats. and indeed I have been in doubt if it should not be an oriental variety, but that species, as figured, is much more depressed, has a more conspicuous liration at some distance from the suture, and the radiating sculpture seems to be more conspicuous in S. ionica.

Indonesia. Banda Sea.