Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . — 28,0(38,9) — 28,0(38,9) 7x2 15x2 Z808 90,0 27,0(30,0) 32,0(35,5) 0,84 37,0(41,1) 9x2 12x2 Description This is a relatively small-shelled species, the maximum observed diameterbeing 102 mm, of which half is body chamber. The umbilical width varies duringontogeny, being narrowest in early stages at 33 per cent, to wide in later stagesat 41 per cent. Whorl overlap is negligible. Barring the early, smooth stage, thewhorl section throughout is higher than wide, with maximum width at theumbilical edge (Fig. 3E). The umbil
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . — 28,0(38,9) — 28,0(38,9) 7x2 15x2 Z808 90,0 27,0(30,0) 32,0(35,5) 0,84 37,0(41,1) 9x2 12x2 Description This is a relatively small-shelled species, the maximum observed diameterbeing 102 mm, of which half is body chamber. The umbilical width varies duringontogeny, being narrowest in early stages at 33 per cent, to wide in later stagesat 41 per cent. Whorl overlap is negligible. Barring the early, smooth stage, thewhorl section throughout is higher than wide, with maximum width at theumbilical edge (Fig. 3E). The umbilical wall is high, nearly vertical to over-hanging, and the flanks little inflated, converging to a flattened venter. Towardsthe body chamber the section becomes a little more inflated. The ventral keel isvery prominent, with weak serrations, corresponding in number to lateralornament. Ornament basically consists of radially pinched, sometimes overhangingprominent umbilical (1) tubercles connected to stout, spirally elongated sub- 10 ANNALS OF THE SOUTH AFRICAN MUSEUM. # ^
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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
