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Show 314 MR. E. A. SMITH ON THE [Apr. 1, Lucina pecten, Reeve (non Lamarck), Conch. Icon. pi. 7. figs. 34, 35 a-b. Lucina occidentalis, Reeve, Conch. Icon. Index, Errata. Hab. Various islands in the West Indies, also Cape Verde Islands (P. Furse in Brit. Mus.). This species greatly resembles L. fibula Reeve, from the Philippines, Red Sea, & c , but the radiating ridges do not divaricate on the dorsal margins in the same manner. L. munda, A. Adams (Proc. Zool. Soc. 1855, p. 225), is the same species as L. fibula. MYTILUS EDULIS, Linne? Two or three small specimens collected by Mr. Melliss have been referred to this common species by Jeffreys. They were " found attached to long pieces of seaweed " which drift on shore at Sandy Bay beach on the south coast (Melliss), so probably had been carried northward from S. Africa. They might with equal propriety be referred to M. compressus, Phil., or M. meridionalis, Krauss. MYTILUS MAGELLANICUS, Chemnitz. Both Mr. Melliss and Capt. Turton obtained this form from seaweed. The specimens are all small, about an inch in length, and show considerable variation in the number and coarseness of the ribs. The colour varies from yellow to purplish. MODIOLARIA MARMORATA (Forbes). Hab. Gt. Britain, Mediterranean, Canary Islands. According to Jeffreys this species also occurs in the Gulf of Suez, the Persian Gulf, and N. Pacific. The specimens from St. Helena collected by Capt. Turton are vividly mottled, but agree in form and sculpture with European specimens. CRENELLA PURA. (Plate XXIV. fig. 26.) Testa minuta, cequilateralis, triangularis, inferne arcuata, alba valvce mediocriter convexce, erassiusculce, radiatim anquste sulcatcc, sulcis interstitiis angustioribus, lineis incrementi striates dorsi utrinque valde declivis, subrectilinearis ; umbonespromi-nentes ; linea carditis valida, infra et pone umbones transversim striata, sulco angusto ligamentalipostice obliquo sculpta ; pagina interna nitida, alba, haud margaritacea, margine inferiori plus minus denticulato, dentibus 2-3 validis ad extremitatem posticam linece cardinalis instructa. Longit. 3 millim., alt. 3^, diam. 2. This little species for its size is rather solid, and peculiar on account of its hinge-plate, and the two or three denticles at the posterior end, just within the margin of the valves. PECTEN PUSIO, Linn. Hab. Mediterranean to Norway and Faroe Isles, Madeira, Canaries, Azores, S. Africa. This species has been quoted from South Africa both by Jeffreys |
