. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. South African Tellina • Boss 105. Plate 6. Figs. 1, 2, and 3. Tellina [Arcopagia] ponsonbyi Sowerby: Fig. 1, external view of the left valve, Albany, South Africa, USNM 98045 (length := mm); Fig. 2, infernal view of the right valve. Still Bay, South Africa, SAM A30022 (length z= mm); Fig. 3, external view of the left valve. Still Bay, South Africa, SAM A30022 (length =: mm). Fig. 4. Tellina (Serratina) copsoides Lamarck: adult individual, external view of the right valve, Durban, NM (length ^ mm).
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. South African Tellina • Boss 105. Plate 6. Figs. 1, 2, and 3. Tellina [Arcopagia] ponsonbyi Sowerby: Fig. 1, external view of the left valve, Albany, South Africa, USNM 98045 (length := mm); Fig. 2, infernal view of the right valve. Still Bay, South Africa, SAM A30022 (length z= mm); Fig. 3, external view of the left valve. Still Bay, South Africa, SAM A30022 (length =: mm). Fig. 4. Tellina (Serratina) copsoides Lamarck: adult individual, external view of the right valve, Durban, NM (length ^ mm). muscle scars rather distinct, posterior scar larger and set somewhat outward, toward posteroventral margin. Shell white to dirty off-white; internally polished, externally dull with darker concentric growth rings. Length Height Width mm mm mm Port Alfred Algoa Bay Jeffrey's Bay — holotype of ponsonbyi Durban — holotype of rietensis syntype of kraiissi off Tugela River — Still Bay Port Alfred Remarks. Tellina ponsonbyi is distin- guished from other South African tellens by its distinctly cancellate or reticulate sculpture. The concentric portions of the sculpture are strongest peripherally and along the posterior dorsal slope, where they may even become somewhat sub- lamellate. The synonyms Tellina rietensis and T. kraussi, introduced by Turton, were based on shape and on beach-worn ma- terial, respectively. As has been indicated in the descrip- tion, T. ponsonbyi undergoes considerable change of shape during ontogeny. Immature. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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