Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum, Volume 47South African Museum, 1963 - Natural history |
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Page 163
... slightly larger than the Type . Heliacus numulus n.sp. Fig . 31 e Protoconch 1 whorls , diam . 0.5 mm . , smooth . Postnatal whorls 21 . Planorboid , ist whorl flat , but upper profile of whole shell very slightly convex . Upper surface ...
... slightly larger than the Type . Heliacus numulus n.sp. Fig . 31 e Protoconch 1 whorls , diam . 0.5 mm . , smooth . Postnatal whorls 21 . Planorboid , ist whorl flat , but upper profile of whole shell very slightly convex . Upper surface ...
Page 353
... slightly in advance of anterior third ; aperture oblique , slightly oval ; apex with 2 notches on each side , the ventral notches deeper than the dorsal notches , between them a triangular tooth - like projection , the dorsal margin ...
... slightly in advance of anterior third ; aperture oblique , slightly oval ; apex with 2 notches on each side , the ventral notches deeper than the dorsal notches , between them a triangular tooth - like projection , the dorsal margin ...
Page 454
... slightly angular ) postero - dorsal margin , almost as in gilchristi . The smaller Algoa Bay specimen and a very worn valve from the Kowie ( Port Alfred ) are also slightly angulated , producing a slightly truncate posterior margin . Is ...
... slightly angular ) postero - dorsal margin , almost as in gilchristi . The smaller Algoa Bay specimen and a very worn valve from the Kowie ( Port Alfred ) are also slightly angulated , producing a slightly truncate posterior margin . Is ...
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Common terms and phrases
1st whorl 27 fathoms 2nd whorl 3rd whorl 40 fathoms 4th whorl 80 metres agulhasensis alfredensis Algoa Bay aperture apical Braga Cape Morgan Cape Natal Cape Point capensis central plate columella cusp dead Delagoa Bay diam dorsal Durban East London False Bay figure Fossil Gmelin granules grooves growth-lines Inhambane intermediaries Jaeckel juvenile Krauss Krss Lamy last whorl lateral plate left valve length Linn lirae living Macnae & Kalk marginal plates Martens Mossel Bay Muir n.sp natalensis nodules oblique operculum outer lip P.F. coll periostracum peripheral Pieter Faure Pleistocene pliculae Port Alfred Port Alfred Bartsch Port Elizabeth Port Elizabeth Sowerby posterior Postnatal whorls Protoconch radial Radula Remarks riblets right valve River Natal Saldanha Bay Schilder sculpture shell slightly Smith smooth South African Museum Sowerby Sowerby's species specimens spiral lirae striae suture Table Bay Thiele Tomlin Tugela River Turton umbilicus umbo worn Zululand