. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 36 ANNALS OF THE SOUTH AFRICAN MUSEUM Fam. VASIDAE Bartsch (1915, p. 42) records Xancus globulus Chemn. from 'Gape of Good Hope'. This is certainly not an indigenous South African species. Vasum turbinellum (Linn.) is also doubtfully indigenous, though it occurs at Mozambique Island (). Turton's 'Xancus sp.' (1932. p. 45, pi. 10, no. 333), 3-5 X 2 mm., appears to be a juvenile Mitra. Vasum truncatum Sow. Fig. 10 1892. Sowerby. Mar. Sh. S. Afr., p. 17, pi. 4, fig. 85 (adult, worn). 1902. Smith. J.
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 36 ANNALS OF THE SOUTH AFRICAN MUSEUM Fam. VASIDAE Bartsch (1915, p. 42) records Xancus globulus Chemn. from 'Gape of Good Hope'. This is certainly not an indigenous South African species. Vasum turbinellum (Linn.) is also doubtfully indigenous, though it occurs at Mozambique Island (). Turton's 'Xancus sp.' (1932. p. 45, pi. 10, no. 333), 3-5 X 2 mm., appears to be a juvenile Mitra. Vasum truncatum Sow. Fig. 10 1892. Sowerby. Mar. Sh. S. Afr., p. 17, pi. 4, fig. 85 (adult, worn). 1902. Smith. J. Conch., x, p. 249, pi. 4, fig. 6 (triangularis, juv.). 1903. id. Proc. Mai. Soc, v, p. 370, pi. 15, fig. 3 (adult). Shell thick in adult, conical, spire very low but in juvenile protoconch and first whorl (or first two whorls) forming a projecting papilla. Protoconch: v. infra. Postnatal whorls 6. Shoulder with c. 11 blunt knobs, whose inclusion in succeeding whorls produces an undulate suture. Base with 4 or 5 blunt spiral ridges, more or less interrupted and nodose. Columella with 4 pleats, more or less equally strong; rimate anteriorly at snout but umbilicus open. Periostracum thick, scabrous with close-set growth-lines. 65 X 50 mm. (Sowerby); 48 X 35 mm. (Smith); 66 X 55 mm. (S. Afr. Mus. beach-worn, protoconch and first 3 or 4 whorls missing and end of canal worn); 41 (protoconch missing) X 32 mm., and 55 x 43 mm. (width across shoulder knobs) (S. Afr. Mus.,,the latter specimen retains most of the periostracum). Port Elizabeth, Port Alfred (Sowerby, Bartsch, Turton); Port St. Johns (S. Afr. Mus.). In deep water off Durban and Port Shepstone (Smith); off Durban (S. Afr. Mus.). A juvenile obtained by the off Umkomaas River (Natal), 40 fathoms, is worth a separate description and figure. [5 / 10 mm. Protoconch 2I-3 whorls, papilliform, gradually passing into first postnatal whorl without distinct junction; 1st whorl somewhat worn, 2nd with 5 or 6 very faint spiral carin
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
