. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 52. (a), (b) Columbarium radiate (Watson), apex and later whorl, (c) C. angulare n. sp. n. sp. (e) central and lateral radula plates of C. radiale (Watson). (d) C. rotundum Columbarium angulare n. sp. Fig. 52W Axial ribs distinct. Protoconch 2\ whorls, alt. 1-5, diam. 1-3 mm., smooth but a faint median lira on last half whorl. Postnatal whorls 7, profile angulate but not carinate; axial ribs on 1st whorl 10-11, on 2nd 10-12, on 3rd and following whorls 12 (sometimes 13), forming bluntly triangul
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 52. (a), (b) Columbarium radiate (Watson), apex and later whorl, (c) C. angulare n. sp. n. sp. (e) central and lateral radula plates of C. radiale (Watson). (d) C. rotundum Columbarium angulare n. sp. Fig. 52W Axial ribs distinct. Protoconch 2\ whorls, alt. 1-5, diam. 1-3 mm., smooth but a faint median lira on last half whorl. Postnatal whorls 7, profile angulate but not carinate; axial ribs on 1st whorl 10-11, on 2nd 10-12, on 3rd and following whorls 12 (sometimes 13), forming bluntly triangular lobes at inter- sections with the peripheral lira, from suture to suture on early whorls, but gradually receding from the suture above on later whorls, on body-whorl distinct below periphery as far as level of top of aperture, evanescent on base; spiral lirae distinct but not predominant, the peripheral lira well marked but not carinate as in radiale, on 1st whorl 2 above and 2 below peripheral lira, on 2nd 3 above and 2 below, on 3rd 4 above and 2 below, increasing to (7) 8-9 above and 5-6 below, equal in strength but usually 2 of those below periphery stronger than the others; on base at least 15-20 additional lirae with inter- mediaries. Periostracum thin, fibrous, fimbriate. 51 (protoconch missing) X 13 mm. Operculum and radula as in radiale. The radula with 85-95 rows. Three radulae were examined; in one of them the side cusps on the central plate were. 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
