Annals of the South African Museum, Volume 13The Museum, 1923 - Natural history |
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Page 121
... Acavidae , and a new Sub - family , Dorcasiinae , may conveniently be founded to contain them . The Dorcasiinae are distributed in all shapes and sizes along the south - western seaboard of Africa , from Algoa Bay to Damaraland , and in ...
... Acavidae , and a new Sub - family , Dorcasiinae , may conveniently be founded to contain them . The Dorcasiinae are distributed in all shapes and sizes along the south - western seaboard of Africa , from Algoa Bay to Damaraland , and in ...
Page 122
... Acavidae . Now it is not difficult to form some idea as to what the first members of the Acavidae were like ; for it is reasonable to suppose that they would possess any primitive characters that are still retained by some of their ...
... Acavidae . Now it is not difficult to form some idea as to what the first members of the Acavidae were like ; for it is reasonable to suppose that they would possess any primitive characters that are still retained by some of their ...
Page 123
... Acavidae . It will be seen that they were more primitive than many modern snails , but probably at the beginning of the Mesozoic era they were both larger and more highly organized than most of the other families then living . And the ...
... Acavidae . It will be seen that they were more primitive than many modern snails , but probably at the beginning of the Mesozoic era they were both larger and more highly organized than most of the other families then living . And the ...
Page 124
... Acavidae developed differences as they spread in various directions , they remained more primitive than those in the ... Acavidae was divided into four large islands . Henceforth each of the divisions of the family would develop ...
... Acavidae developed differences as they spread in various directions , they remained more primitive than those in the ... Acavidae was divided into four large islands . Henceforth each of the divisions of the family would develop ...
Page 126
... Acavidae . The penial retractor arises from the columellar muscle , or from far back on the floor of the lung , instead of near the front . * Hedley , to whom we owe so much of our knowledge of these snails , was the first to ...
... Acavidae . The penial retractor arises from the columellar muscle , or from far back on the floor of the lung , instead of near the front . * Hedley , to whom we owe so much of our knowledge of these snails , was the first to ...
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Common terms and phrases
abactinal Abactinal plates Acavidae actinal adambulacral plates adult and young alexandri anal aperture arm-spines arms Asterina basal brown Cape Colony Cape Point capensis coast Depth of body disk distal Döderlein Dorcasia dorsal duct ECHINODERMS False Bay fauna figs furrow genus globulus granules Holothuria holotype Indo-Pacific inferomarginal inscription interradial K. H. Barnard known larger length of head less littoral longitudinal madreporite marginal plates Marinula miles Mossel Bay Mozambique Natal nearly Nucras numerous oral papillae Oral plates outer papillae Pectorals pedicellariae penis peristome PIETER FAURE collection pores posterior proximal radial shields radula rays scales segments setae shell side slender slightly smaller snout South African Museum South African Species specimens spinelets spines superomarginals surface swollen Table Bay teeth thick transverse Trigonephrus tubercles Tugela River Type upper arm-plates vas deferens ventral vertical whorls wide width Zool