Pleurotoma cancellata. (synonymous) Acc. to R. (nr. 317): Whorls keeled at the upper part, transversally very finely ridged, ridges cancellated with longitudinal striae, aperture small; jet black, ridges dirty white. St. Vincent, W.I.. Acc. to fig. 9 x 3.5 mm. — Acc. to Maes (1983, fig. 16): Crassispira (Monilispira) described without locality and with a misleading fig., is synonymous with cancellata. Of 8 specimens from Guana island the size was 6.9-8.1 mm, the number of whorls 6-8.3, the number of major axials 18-30, of major spirals 9-14. Virgin Islands, Eastern Caribbean to Tobago and the Netherlands Antilles, — Our specimens measure up to 8.8 x 3.5 mm, 1,5 + 7 w., 22 ribs. The nuclear whorls have 2 smooth keels, as pictured by Olsson & McGinty (1958, pl. 2, fig. 1) for Rissomurex muricoides C. B. Ads. The first postnuclear whorl, has 2 finely beaded spirals; on the penultimate whorl there are 4 spirals, the upper one (keel) may become weak on the last whorls and is followed by a wider space than occurs between the following spirals; evenly spaced spiral threads; axial threads (growthlines) uneven and less numerous; a = 0.31; sinus moderately deep. Several specimens collected on algae at Boca Canoa.