. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. South African Tellina • Boss 151. Plate 20. Figs. 1 and 2. Tellina [Angulus] canonica Salisbury, East London, South Africa, NM 2983 (length =z mm); Fig. 1, external view of the left valve; Fig. 2, internal viev^ of the right valve. Fig. 3. Macoma [Scisiulina] dispar (Conrad): external view of the right valve, to show fine acentric sculpture, Santa Carolina, Bazaruto Bay, Mozambique, MCZ (length := mm). Fig. 4. Heterodonax ludwigii (Krauss): external view of the right valve, Delagoa Bay, Mozambique, SAM A3002
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. South African Tellina • Boss 151. Plate 20. Figs. 1 and 2. Tellina [Angulus] canonica Salisbury, East London, South Africa, NM 2983 (length =z mm); Fig. 1, external view of the left valve; Fig. 2, internal viev^ of the right valve. Fig. 3. Macoma [Scisiulina] dispar (Conrad): external view of the right valve, to show fine acentric sculpture, Santa Carolina, Bazaruto Bay, Mozambique, MCZ (length := mm). Fig. 4. Heterodonax ludwigii (Krauss): external view of the right valve, Delagoa Bay, Mozambique, SAM A30021 (length = 23 mm). in young stages; generally shining or polished internally. Length Height Width Hilo, Hawaii Hawaiian Islands Durban Durban Bluff Cocos-Keeling Id. Mala Bay, Maui, Hawaii Remarks. The nature of the dentition is of subfamilial importance in the Tellinidae. The Macominae are laterally edentate, whereas the Tellininae have one to four variously developed lateral teeth. Notwith- standing the obsolescence or disappearance of certain lateral dental elements in the Tellininae, all Tellininae have some de- velopment of the right anterior lateral tooth, even though that tooth may be al- most incorporated into the cardinal com- plex, as in T. (Homalina) trilatera (). The complete absence of lateral denti- tion in S. dispar, and particularly the lack of any evidence of a right anterior lateral tooth, indicates that this species is not a Tellina and, further, that it is truly of macomoid affinities. The species has been variously dealt with in the literature and has been considered in the superspecific grouping named Fahulina Gray 1851 with Tellina fahula Gmelin as type-species. As a matter of fact, S. dispar has been con-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of t
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