. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 258 Annals of the South African Museum. TRANSVAAL. Pretoria; Buiskop; Pienaars Poort; Johannes- burg (type of paula). BECHUANALAND. Tlapies Laagte Well, west of Vryburg (subfossil, Rogers). LORENZO MARQUES. Bandula Siding, B. & M. Rly. (McDowell). Types in British Muesum. The costae vary greatly in strength, being in some cases hardly noticeable, when the surface merely appears to be striate; the largest examples from Lakeside measure 2-3 mm. in diameter. The foot has well-marked peripodial groov
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 258 Annals of the South African Museum. TRANSVAAL. Pretoria; Buiskop; Pienaars Poort; Johannes- burg (type of paula). BECHUANALAND. Tlapies Laagte Well, west of Vryburg (subfossil, Rogers). LORENZO MARQUES. Bandula Siding, B. & M. Rly. (McDowell). Types in British Muesum. The costae vary greatly in strength, being in some cases hardly noticeable, when the surface merely appears to be striate; the largest examples from Lakeside measure 2-3 mm. in diameter. The foot has well-marked peripodial grooves; jaw as in the sub- family; radula measures -625 x -125 mm. when flattened out, formula (15 +1 +15) x 105 (another specimen measures -525 x-115 mm., formula (14 + 1 + 14) x 94); central tooth tricuspid, rather narrow, with oblong basal plate, mesocone less than half the length of the basal plates and its ectocones extremely small; lateral teeth not so narrow as central, mesocones about half the length of the basal plates, ectocones scarcely exceeding half the size of the mesocones. In addition to these two principal cusps each lateral has an exceed- ingly minute endocone. Punctum pallidum Conn. (PI. ix, f. 9-10, and text-fig. 21.) 1922. Punctum pallidum Conn., , x, p. 119. D. 1925. ,, ,, ,, Trans. R. Soc. S. Africa, xii, p. 151, pi. iv, f. 17. Far smaller than the foregoing, nearly colourless, with a more exserted spire. There are 4 convex whorls, protoconch with microscopic spiral striae, remainder. B Text-fig. 21.—Punctum pallidum Conn., Vengo Mountain. A Jaw; x300. B. Half of a transverse row of teeth from the radula; x 1600. covered with fine, slightly oblique, microscopic transverse striae, about 0-03 mm. apart on last whorl, interspersed with finer ones, which are crossed by fine spiral. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustr
Size: 1829px × 1366px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
