. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO THE KNOWLEDGE OF SOUTH AFRICAN MARINE MOLLUSCA 643 The size of the present protoconch seems to indicate a small species about the size of the species of Afritrophon. Probably a muricid, less likely a turritid. From its fresh unworn condition the shell cannot have been washed up from far off the P Cvv).^ Fig. 19. a-e. Genus? f. Radula of Pterynotus (Poropteron) mitraeformis (Sow.). Fam. Columbariidae Columbarium cf. formosissimum Tomlin, 1928 Fig. 20b Columbarium formosissimum
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO THE KNOWLEDGE OF SOUTH AFRICAN MARINE MOLLUSCA 643 The size of the present protoconch seems to indicate a small species about the size of the species of Afritrophon. Probably a muricid, less likely a turritid. From its fresh unworn condition the shell cannot have been washed up from far off the P Cvv).^ Fig. 19. a-e. Genus? f. Radula of Pterynotus (Poropteron) mitraeformis (Sow.). Fam. Columbariidae Columbarium cf. formosissimum Tomlin, 1928 Fig. 20b Columbarium formosissimum Tomlin, 1928: 331, pi. 25, figs 1, 2. Description: Protoconch, altitude 1-5, diameter 1-3 mm, smooth, 2 whorls, junction with 1st post-natal whorl not distinct. 7 post-natal whorls, profile angulate a little below the middle of the whorl; axial ribs 12 on 1st 3 whorls, reduced to 10 on later whorls, stronger below than above the peripheral angulation where they form ± complanate rounded lobes. On the body whorl the ribs are slightly angular below the peripheral lobes. Fine spiral lirae above the periphery, 2 on 2nd whorl, increasing to 6 (7) on 6th whorl, but becoming obsolete on 7th whorl except 2 or 3 faint ones just above the lobes; below peri- phery one on 2nd whorl increasing to 3 on 6th and 4 on 7th whorl; on body whorl 3 slightly stronger lirae form small projections on the profile, with a fine intermediary between each pair; below these, on base and rostrum at least 25 lirae. Growth-lines rather prominent, forming axial striation above the peri-. 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 : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
