. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 22. Protoconchs of: a. Viriola innocens Thiele, non Sow. = thielei nora. nov. b, c, two examples of V. erecta (Thiele). d, V. fuscescens (Smith). each whorl has 5 lirae. In this respect it differs from the other shells in which the basal lira is concealed bv each successive whorl. IIriola fuscescens (Smith) Fig. 22 d Triforis cingulata {non A. Adams) (partim: see Smith), Sowerby, 1892, p. 36. Trifora fuscescens Smith. 1904. p. 37. pi. 3. fig. 6. Triforis ima Bartsch. igi5. p. 108, pi. 10, fig. 6
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 22. Protoconchs of: a. Viriola innocens Thiele, non Sow. = thielei nora. nov. b, c, two examples of V. erecta (Thiele). d, V. fuscescens (Smith). each whorl has 5 lirae. In this respect it differs from the other shells in which the basal lira is concealed bv each successive whorl. IIriola fuscescens (Smith) Fig. 22 d Triforis cingulata {non A. Adams) (partim: see Smith), Sowerby, 1892, p. 36. Trifora fuscescens Smith. 1904. p. 37. pi. 3. fig. 6. Triforis ima Bartsch. igi5. p. 108, pi. 10, fig. 6. [?] Viriola sowerbyi Turton, 1932, p. 119, pi. 26, no. 872. [?] Viriola crebrkingulata Turton. 1932, p. 120, pi. 26, no. 873. Viriola minuta Turton, 1932, p. 120, pi. 26, no. 874 (=juv.). Protoconch 1^ (2) whorls, alt. 0-5, diam. 0-3-0-4 mm., slightly oblique, smooth, but later part of last whorl bilirate, junction with 1st postnatal whorl indistinct. Postnatal whorls 13-16; first 2 whorls bilirate, 3rd trilirate, from about the 4th or 5th (sometimes 3rd, but sometimes not until 7th or 8th whorl) 4-lirate; uppermost lira usually a little broader than the others. On later whorls a thin intermediary lira may develop between the 2nd and 3rd lirae, and another (more rarely) between 3rd and 4th (cf. Bartsch, 1915, p. 109); in the latter case there are 6 lirae. The increase in the number of lirae is not always due to interpolation of a newly formed lira, but sometimes to the splitting of a lira. Base with 2 lirae below the peripheral lira. Up to 13 x 2-75 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
