. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. £ till ~ Illl Fig. 20. a, Thecalia concamerata (Brug.) prodissoconch. b, c, Carditella rugosa Sow., juvenile with prodissoconch, mm.; prodissoconch and umbo of shell 1-3 mm. long (antero-posterior). d, e, Venericardia elata (Sow.) right valve of juvenile 1-25 X 1-5 mm., left valve of adult, with , V. minima (Smith) left valve, g, V. fortisculpta left valve, with profile, h, C. laticosta Smith juvenile 1-5 X 1-3 mm. i, C. capensis Smith two radial ribs with profile, j, C. similisj.
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. £ till ~ Illl Fig. 20. a, Thecalia concamerata (Brug.) prodissoconch. b, c, Carditella rugosa Sow., juvenile with prodissoconch, mm.; prodissoconch and umbo of shell 1-3 mm. long (antero-posterior). d, e, Venericardia elata (Sow.) right valve of juvenile 1-25 X 1-5 mm., left valve of adult, with , V. minima (Smith) left valve, g, V. fortisculpta left valve, with profile, h, C. laticosta Smith juvenile 1-5 X 1-3 mm. i, C. capensis Smith two radial ribs with profile, j, C. similisj. & T. two radial ribs with profile. Venericardia elata (Sow.) Fig. 20 d, e Cardita elata Sowerby, 1892, p. 63, pi. 3, fig. 67; Turton, 1932, p. 232. Venericardia elata (Sow.), Bartsch, 1915, p. 192; Jaeckel & Thiele, 1931, p. 216. Venericardia africana Bartsch, 1915, p. 192, pi. 48, fig. 3, pi. 54, figs. 5, 6. Cardita africana (Bartsch), Turton, 1932, p. 232. Prodissoconch separated from succeeding growth by a slight collar, 0*3 mm. wide (antero-posteriorly), 3 riblets beginning at collar but soon, at alt. 0-5 mm., with an additional one, making the 4 main ribs which demarcate the middle area of the shell, and from which the anterior and posterior areas slope away; posteriorly this slope is slightly but usually distinctly concave; additional riblets develop by interpolation between the 4 main ribs, also on the anterior area,. 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
