. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 159. Olcostephanus {Olcostephanus) uitenhagensis (Kitchin) (?). Whorl section of SAM-PCU1524. Dotted line represents shape of the final peristome. x 0,5. venter. Parabolae are lacking on the outer whorls, although the peristome is strongly constricted, cutting obliquely across 4 ribs to the posterior, and with a prominently flared adapical margin. Measurements No. D H Wi W/H Uo Ui SAM-5069 225 88 1,11 87 67(30) ?? 69 82 1,19 49 37(24) SAM-PCU1524 188 71 1,00 74 51(27) 5? 155 67 c
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 159. Olcostephanus {Olcostephanus) uitenhagensis (Kitchin) (?). Whorl section of SAM-PCU1524. Dotted line represents shape of the final peristome. x 0,5. venter. Parabolae are lacking on the outer whorls, although the peristome is strongly constricted, cutting obliquely across 4 ribs to the posterior, and with a prominently flared adapical margin. Measurements No. D H Wi W/H Uo Ui SAM-5069 225 88 1,11 87 67(30) ?? 69 82 1,19 49 37(24) SAM-PCU1524 188 71 1,00 74 51(27) 5? 155 67 0,96 52 35 (22) Discussion Olcostephanus uitenhagensis is a macroconch characterized by the marked egression of the umbilical seam on the final whorl, its compressed form, and the change in the nature of the tuberculation on the body chamber. Olcostephanus of the astierianus plexus do not show the marked egression. 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
