. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. 84 ANNALS OF THE SOUTH AFRICAN MUSEUM. Figs. 15-19. Some forms of Pisidium langleyanum Melvill & Ponsonby. Fig. 15. Lectotype, left valve at the top, C4 reduced. Fig. 16. Paratype, left valve, nearly oval. Fig. 17. Trigonal shell with prominent beaks, right valve at the top, C4 reduced; specimen from Jonkershoek near Stellenbosch. Fig. 18. Left valve from Lake Chrissie; AS, anterior adductor scar; PS, posterior adductor scar. Fig. 19. Subtrigonal specimen from Potchefstroom, Transvaal. Enlargements: figs. 15, 16,
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. 84 ANNALS OF THE SOUTH AFRICAN MUSEUM. Figs. 15-19. Some forms of Pisidium langleyanum Melvill & Ponsonby. Fig. 15. Lectotype, left valve at the top, C4 reduced. Fig. 16. Paratype, left valve, nearly oval. Fig. 17. Trigonal shell with prominent beaks, right valve at the top, C4 reduced; specimen from Jonkershoek near Stellenbosch. Fig. 18. Left valve from Lake Chrissie; AS, anterior adductor scar; PS, posterior adductor scar. Fig. 19. Subtrigonal specimen from Potchefstroom, Transvaal. Enlargements: figs. 15, 16, 17 and 19, see scale in fig. 17; fig. 18, see scale in 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 [etc. ] The Museu
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Keywords: ., bookauthorsouthafr, bookcentury1800, bookdecade1890, bookyear1898
