. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A Monographic Survey of South African Non-marine Mollusca. 281 Tulbaghinia isomerioides (M. & P.). (Text-fig. 23.) Eef. List No. 287. 1898. Dorcasia (Tulbaghinia) isomerioides M. & P., , i, p. 28, pi. viii, f. 10. 1915. Tulbaghinia isomerioides M. & P., Conn., Ann. Mus., xiii, p. 174. D. 1934. Tulbaghinia isomerioides M. & P., Watson, Proc. Mai. Soc, xxi, p. 154. A. Shell large, depressed globose, umbilicate, silky, semi-transparent, corneous red-brown above, slightl
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A Monographic Survey of South African Non-marine Mollusca. 281 Tulbaghinia isomerioides (M. & P.). (Text-fig. 23.) Eef. List No. 287. 1898. Dorcasia (Tulbaghinia) isomerioides M. & P., , i, p. 28, pi. viii, f. 10. 1915. Tulbaghinia isomerioides M. & P., Conn., Ann. Mus., xiii, p. 174. D. 1934. Tulbaghinia isomerioides M. & P., Watson, Proc. Mai. Soc, xxi, p. 154. A. Shell large, depressed globose, umbilicate, silky, semi-transparent, corneous red-brown above, slightly mottled with dark and paler shades, paler beneath. Spire little exserted, apex obtuse. Whorls 5j, rather rapidly increasing, C I lb 35 ^0 W moderately convex, rounded at periphery, sculptured all over with ^^ f* -^ f ^ f~~\ fTH C~^ curved, oblique striae, the whole surface shagreened and somewhat irregularly malleate. Aperture oblong ovate, peristome white, glossy, narrowly reflexed, labrum straight Text-fig. 23.—Tulbaghinia isomerioides and receding considerably in profile, ?""?• ® "•» -Lulbagh. columella oblique, sharply angulate Representative teeth from radula; x300. over the umbilicus shortly before joining the paries; there are 3 glossy white tubercles on the inner margin of the peristome on the left of the base, just below the columella; umbilicus deep, narrow, slightly strangulate. i)iam. maj. (type) 29-2, min. 24-1; alt. 16-1; apert. alt. 14-5, lat. 12-7 mm. Hab. CAPE PROVINCE. Winterhoek Mountain, Tulbagh (type, Marloth); Mostert's Hoek Peak, 4000-5500 feet; Brandwacht- Fonteinjesberg Mts., north of Worcester, 3000 feet (Barnard). Type in British Museum. The amount of mottling varies in individuals, some of which show traces of narrow dark or light bands; the peristomatal tubercles also vary in strength and number, and may well be an adventitious feature caused by grains of sand adhering to the slimy surface of the lip just before periods of g
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
