. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO KNOWLEDGE OF MARINE MOLLUSCA 47 lira may be duplicated); lirae cut by 15-16 narrow axial grooves on 2nd whorl, increasing to c. 24 on 5th, and c. 50 on last whorl; sculpture cancellate with squares on early whorls and axial oblongs on later whorls, but spiral lirae predominant. Columella pleats 3, sometimes a feeble 4th. 26 X 9 mm., width of 3rd whorl 1*5-1*75 mm. Buff, more or less rufescent, possibly due to staining (iron stanchions, etc., in Durban harbour). Durban (Sowerby;
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO KNOWLEDGE OF MARINE MOLLUSCA 47 lira may be duplicated); lirae cut by 15-16 narrow axial grooves on 2nd whorl, increasing to c. 24 on 5th, and c. 50 on last whorl; sculpture cancellate with squares on early whorls and axial oblongs on later whorls, but spiral lirae predominant. Columella pleats 3, sometimes a feeble 4th. 26 X 9 mm., width of 3rd whorl 1*5-1*75 mm. Buff, more or less rufescent, possibly due to staining (iron stanchions, etc., in Durban harbour). Durban (Sowerby; also S. Afr. Mus. ex coll. Ross-Frames, fresh, presumably living).. Fig. 12. One whorl (semi-diagrammatic) of {a) Mitra circula Kien.; (b) M. rufescens A. Ad.; (c) M. acuti- lirata Sow.; (e) Dnkr.; (d) protoconch and first two postnatal whorls of M. acutilirata Sow. Mitra acutilirata Sow. Fig. 12(«), (d) 1874. Sowerby. Thes. Conch., iv, sp. 129, pi. 15, figs. 273, 274. 1936. Peile. loc. cit., p. 142 (radula). Aperture subequal to spire. Protoconch 4 whorls, somewhat lopsided, alt. o-8, diam o-6 mm., smooth. Postnatal whorls 8. Spiral lirae 3 at start of 1st whorl, 4 on each of 2nd-6th whorls, 5 on 7th and 8th whorls, 7-8 additional lirae on base; these main lirae rather sharply subcarinate', between them 1-3 striae and sometimes a weaker intermediary subcarinate lira on last whorl; lirae cut by 13-14 narrow axial grooves on 2nd whorl, increasing to c. 22 on 5th and 45-50 on last whorl; sculpture cancellate with small squares and axial oblongs. Columella pleats 4, the lowermost one feeble. 26 X 9 mm., width of 3rd whorl 1-5-1-75 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
