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Show 38 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Jan. 20, Indian Ocean and the coast of Madagascar) are certainly not applicable to this common Mediterranean species. Weinkauff regards the typical form (his millepunctata) and N. hebrcea as different species. Karsten's name punctata, which was adopted by Risso without acknowledgment, or through coincidence, is ten years subsequent to Gmelin's. Family XXI. NERITID^E. NERITINA VIRIDIS, Linne. Nerita viridis, L. S. N. p. 1254; Chemnitz, Conch.-Cab. ix. t. 124. f. 1089. 'Porcupine' Exp. 1870 : Med. St. Algesiras B. Distribution. Mediterranean from the south of France to the coast of Syria, Adriatic, Madeira, Canaries, West Indies, and Martinique ; 3-120 fms. It is an inhabitant of shallow water. Fossil. Post-tertiary : Palermo (Philippi). Varies in the intensity of colour as well as in the markings. Family XXII. SOLARIID^E. 1. S O L A R I U M P S E U D O P E R S P E C T I V U M , Brocchi. Trochus pseudoperspectivus, Brc. Foss. Subap. ii. p. 359, t. v. f. 18. Solarium discus, Philippi, Moll. Sic. ii. p. 225, t. xxviii. f. 12; Conch.-Cab. (ed. Kiister), Solarium, p. 29, t. 4. f. 9. 'Porcupine' Exp. 1870 : Med. St. 50, 51, Benzert Road, Rasel Amoush, Adventure Bank. Distribution. Bay of Biscay ('Travailleur' Exp.), throughout the Mediterranean, Alexandria (Lamarck, as S. perspectivum), Barbary (Ponsonby), Canary I. (McAndrew); 40-108 fms. Fossil. Miocene: Vienna Basin, Perpignan, and Calabria. Pliocene : (?) Biot near Antibes, Italy, Sicily, and Algeria. Post-tertiary : Selsea, Morea. Owing to the variability of the shell, especially in the fossil state, the synonyms are rather numerous. I regard S. simplex of Bronn, S. lyellii of Michelotti, S. discus of Philippi, S. sulcatum of O. G. Costa (not of Lamarck), S. pulchellum of Tiberi (not of Michelotti), S. perspectiforme also of Tiberi, S. mediterraneum of Monterosato, probably S. nuperrimum of Brugnone, and perhaps S. contextum of Seguenza, as varieties of the present species. The number of concentric ridges or striae, as well as the height of the spire, and consequent contraction of the umbilicus, differ in specimens from distant localities. The lowest part or deepest interior of the umbilicus, which represents the obverse of the spire, is flattened, and has the whorls reversed or sinistral. Monterosato has described the animal in the 'Journal de Conchyliologie ' for 1874. |
