. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A Monographic Survey of South African Non-marine Mollusca. 437 LORENZO MARQUES. Lebombo Mountains, under bark of dead tree (Junod); Wanetsi River, Majude District (Bell Marley). ZULULAND. Banks of R. Pongola (Bell Marley). S. RHODESIA. Near Gwelo (Dodds). Type in British Museum. The type set of this species consists of immature examples, whose close resemblance to punctata at the same stage of growth caused me to unite them, but now that mature shells have come to hand in quantity they prove to be ab
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A Monographic Survey of South African Non-marine Mollusca. 437 LORENZO MARQUES. Lebombo Mountains, under bark of dead tree (Junod); Wanetsi River, Majude District (Bell Marley). ZULULAND. Banks of R. Pongola (Bell Marley). S. RHODESIA. Near Gwelo (Dodds). Type in British Museum. The type set of this species consists of immature examples, whose close resemblance to punctata at the same stage of growth caused me to unite them, but now that mature shells have come to hand in quantity they prove to be abundantly distinct. Section Pleurorhachis n. Type Bulimus petersi Pfr. Shell similar in appearance to Rachis, but apical whorls sculptured with strong, distant, radial ribs (text-fig. 37). Rachis petersi (Pfr.). (PL xiii, f. 15, and text-fig. 37.) Kef. List No. 325. 1855. Bulimus petersi Pfr., , p. 97. D. 1925. Rhachis petersi Pfr., Conn., Trans. R. Soc. S. Africa, xii, p. 160. Shell small, acuminate ovate, umbilicate, fairly solid, moderately smooth and glossy, first 3 whorls brown, later cream, with narrow brown streaks about as broad as the intervals between them. Spire pro- duced, sides very slightly convex, apex acute, angle 57°. Whorls 6^, moderately convex, first 2 sculptured to extreme apex with strong, straight, nearly equidistant radial costae, 43 in number to end of 2nd whorl, where they cease abruptly, remainder bearing close, fairly regular, rather coarse, straight, nearly vertical striae, weaker on last whorl, with signs of microspiral dotted lines about the 4th, but not clear enough for exact determination; suture simple, well defined. Aperture vertical, suboval, peristome simple, labrum straight and receding slightly in profile, columella erect, margin triangularly reflexed, partly overhanging the comparatively wide umbilicus. Alt. 12-0, lat. 6-2; apert. alt. 5-5, lat. 2-7; last whorl 8-3 mm. Hab. LORENZO MARQUES. Tette Text-ito. 37.—AwdK.(Pleuro- (
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
