. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO THE KNOWLEDGE OF SOUTH AFRICAN MARINE MOLLUSCA 653 perfectly smooth columella. It is very similar to the North Atlantic Turbo pelo- ritanus Contraine and its varieties as figured by Locard (1897: pi. 21, figs 28-36). In shape it is almost like var. cingulatus Locard (fig. 31) but the liration is not quite like that in any of Locard's figures. For the time being this solitary speci- men from a widely distant region may be regarded as a new species. Fam. Trochidae Calliostoma circus n.
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO THE KNOWLEDGE OF SOUTH AFRICAN MARINE MOLLUSCA 653 perfectly smooth columella. It is very similar to the North Atlantic Turbo pelo- ritanus Contraine and its varieties as figured by Locard (1897: pi. 21, figs 28-36). In shape it is almost like var. cingulatus Locard (fig. 31) but the liration is not quite like that in any of Locard's figures. For the time being this solitary speci- men from a widely distant region may be regarded as a new species. Fam. Trochidae Calliostoma circus Fig. 27b Description: Protoconch nucleus plus 6 whorls. Profile straight. Sutures sunken. 1st to 3rd whorls with 2 beaded spiral lirae, the upper margin (bordering the suture) also beaded. On 4th whorl an intermediary develops between the beaded upper margin and the 1st lira, and one below the 2nd lira; both becom- ing stronger on 5th whorl; the beaded upper margin also moves away from the. Fig. 27. a. Turbo boswellae b. Calliostoma circus actual sutural margin, becoming a separate beaded lira. The 5th and 6th whorls thus show 2 beaded lirae in the upper half of the whorl and 3 in the lower half, on the 6th whorl a fine non-beaded intermediary develops between the suture and the 1st lira, between the 1st and 2nd lira, and between the 2nd and 3rd; also one below the 5th lira, below it and the 1st basal lira; at the end of the 6th whorl (back of outer lip) the latter intermediary becomes double. Base with 1st lira strong, followed by about 20 lirae, more or less subequal in strength. Aperture subcircular, nonperforate. Radula with 5 (6) laterals, 1st marginal stout, 4-5 dentate, the outermost marginal strap-shaped. Truncate apex slightly turned over. Shell 23 X 23 mm. White, iridescent when wet. Locality: Presumably somewhere off Gape Point. Taken by Please note that these images are extracted from scanned page images that may have been digitally enhance
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
