Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . 24,5(42,9)28,0(40,0) 21,0(36,8)28,0(40,0) 1,171,00 21,0(36,8)25,0(35,7) 2427 2427 Description Coiling is relatively involute in the early stages, covering the ventralquarter of successive whorls, but becomes more evolute towards the bodychamber. On the phragmocone the costal whorl section is subquadrate, as wideas high, or slightly wider than high with maximum width at the umbilical later whorls the section becomes more inflated, and subtrigonal (Fig. 45B)with no distinct umbilical edge. Ornament, especially o
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . 24,5(42,9)28,0(40,0) 21,0(36,8)28,0(40,0) 1,171,00 21,0(36,8)25,0(35,7) 2427 2427 Description Coiling is relatively involute in the early stages, covering the ventralquarter of successive whorls, but becomes more evolute towards the bodychamber. On the phragmocone the costal whorl section is subquadrate, as wideas high, or slightly wider than high with maximum width at the umbilical later whorls the section becomes more inflated, and subtrigonal (Fig. 45B)with no distinct umbilical edge. Ornament, especially on the inner whorls of the three available specimens,differs considerably, ranging from dense, coarse ribbing with spinose ventro-lateral nodes as in SAS-Z814 (Fig. 47A) to dense ribbing lacking strong ventro-lateral ornament as in SAS-Z633 (Fig. 46). On the outer phragmocone whorls,ornament is similar in the three specimens, consisting of strong, radiallyelongated umbilical tubercles connected by weak, slightly prorsiradiately curved 60 ANNALS OF THE SOUTH AFRICAN MUSEUM.
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
