. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 472 Annals of the South African Museum. Melampus acutispira Turton. (Text-fig. 40.) 1932. Melampus acutispira Turton, Marine Shells of Port Alfred, p. 9, pi. ii, f. 72. The type set of this species contains two shells, of which the larger is a small, beach-rolled, colourless, sculptureless shell, slightly broader than ordinarius, but similar in contour to the obese form of umlaasianus, of which it is probably the young. 6 whorls, shouldered at periphery, apical strongly mamillate, as in umlaasia
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 472 Annals of the South African Museum. Melampus acutispira Turton. (Text-fig. 40.) 1932. Melampus acutispira Turton, Marine Shells of Port Alfred, p. 9, pi. ii, f. 72. The type set of this species contains two shells, of which the larger is a small, beach-rolled, colourless, sculptureless shell, slightly broader than ordinarius, but similar in contour to the obese form of umlaasianus, of which it is probably the young. 6 whorls, shouldered at periphery, apical strongly mamillate, as in umlaasianus, while the second of the type pair, a minute example under 2 mm. in length, is covered with very fine and close microspiral engraving, a feature which appears to exist also in the apical whorls of Kuster's species. The type has a strong columellar fold and 2 close together a short way above it, the upper the longer, and another, smaller, a short way above this, while under a microscope there are signs of 2 or 3 more very weak, probably evanescent processes; there are also 5 equidistant folds inside the labrum. Alt. 5-5, lat. 3-4; apert. alt. 4-0, lat. 0-9; last whorl 4-6 Text-fig. 40.—Melampus acutispira Turton. Type pair in Oxford Museum; x 2. Hab. CAPE PROVINCE. Port Alfred (Turton). Type in Oxford Museum. Until immature specimens of umlaasianus of the same size can be compared with the Turton infant it may be wiser not to embark on the troubled sea of possible synonymy. (ii) Section Signia A. Ad., 1855. (Gen. Rec. Moll., ii, p. 245). Shell with fairly strong, usually decussate sculpture. Melampus semiaratus Conn. Ref. List No. 481. 1898. Melampus granifer Mouss., M. & P., Proc. Mai. Soc, iii, p. 180. L. 1912. Melampus semiaratus Conn., Ann. Mus., xi, p. 228, pi. ii, f. 8. 1925. Melampus semiaratus Conn., Trans. R. Soc. S. Africa, xii, p. 187. Please note that these images are extracted from scanned page images that may have been digitally enhan
Size: 2160px × 1157px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
