. Bulletin of the British Museum (Natural History) Zoology. 74 RHIND AND ALLEN Specimens of Jeffreys labelled N. aegeensis differ markedly in shape and fringe detail from N. bushae. Likewise Dall, (1886) also identified N. aegeensis from the Atlantic off Havana in 320 m and 823 m, off Morro Light 479 m and off St Vincent in 847 m regarding this as a geographical race of Nuculoma tenuis a view not supported by Jeffreys, (1879). There is certainly confusion, an easily accessible example is a compar- ison of the photograph in Abbott, (1974) of a West Atlantic specimen against a well-fig
. Bulletin of the British Museum (Natural History) Zoology. 74 RHIND AND ALLEN Specimens of Jeffreys labelled N. aegeensis differ markedly in shape and fringe detail from N. bushae. Likewise Dall, (1886) also identified N. aegeensis from the Atlantic off Havana in 320 m and 823 m, off Morro Light 479 m and off St Vincent in 847 m regarding this as a geographical race of Nuculoma tenuis a view not supported by Jeffreys, (1879). There is certainly confusion, an easily accessible example is a compar- ison of the photograph in Abbott, (1974) of a West Atlantic specimen against a well-figured specimen in Locard, (1898). They are dissimilar in details of hinge and outline. Shell description The description by Verrill & Bush, (1898) is detailed and accurate. Shell small, elongate-ovate, equivalve, inequilateral; semi- transparent, dentition often visible through shell, surface smooth, lustrous with fine concentric lines; umbos posterior to midline, orthogyrate, to slightly opisthogyrate; when pos- terior margin orientated vertically anterior dorsal margin is well above the horizontal; lunule often bordered by tiny perforations, escutcheon indistinct; teeth typical chevron- shape, number varying with size of specimen, 3 posterior and 4 anterior teeth in a specimen mm in length and 6 posterior and 9 anterior teeth in a specimen mm in length, ligament slightly oblique to moderately narrow hinge plate, does not extend ventral to anterior proximal teeth. Comparative shell measurements of Nuculoidea bushae Dimension (mm) No Mean SD Max Min Length Width Height Length Width Height Length Width Height Length Width Height Length Width Height Length Width Height Length Width Height 25 23 54 55 28 29 NORTH AMERICA BASIN WEST EUROPEAN BASIN BAY OF BISCAY ANGOLA BASIN 0
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