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Show 1881.] 'LIGHTNING'AND 'PORCUPINE ' EXPEDITIONS. 701 DistriBution. South of England to the Mediterranean, Adriatic, iEgean and eastwards, Madeira, Canaries; "Tasmania and South Australia, common" (Tenison-Woods)1; 2-120 fms. Fossil. Pliocene and Post-tertiary : Norfolk and Suffolk, Killiney near Dublin, Biot, Italy, and Madeira. Cardium discors of Montagu, Lucina commutata of Philippi, and four other synonyms. 1. LUCINA SPINIFERA, Montagu. Venus spinifera, Mont. Test. Brit. p. 577, t. 17. f. 1. Lucina spinifera, B. C. ii. p. 240; v. p. 179, pi. xxxii. f, 6. 'Porcupine' Exp. 1869: St. 2, 6, 9, 13, 18, 33, Little Minch, near Belfast. 1870: Atlantic, 9, Vigo B., 16, 17, Setubal B., 22, 25, off C. Sagres, 30; Mediterranean, 45, Cartagena B., 50, 55, Benzert Road, Adventure Bank, off Rinaldo's Chair. DistriBution. Nordland to the Sea of Marmora, Adriatic, Mo-gador, Madeira, Canaries, and Azores; 5-120 fms. Fossil. Miocene, Pliocene, and Post-tertiary: Sweden, Caithness, and throughout Europe to Rhodes. Very variable as to the number and size of the ridges. Eight synonyms. 2. LUCINA BOREALIS, Linne. Venus borealis, L. S. N. p. 1134. Lucina borealis, B. C. ii. p. 242, pi. v, f. 5; v. p. 179, pi. xxxii. f.7. 'Porcupine' Exp. 1869: St. 13, 14, 18, 25, 33, 35, 68. 1870: Atlantic, 9, 10, 29, 30, Tangier B.; Mediterranean, Capo de Gata, Adventure Bank. Distribution. Vadso and Faroe Isles to Sea of Marmora, Adriatic, Mogador, E.. and W . coasts of North America (P. Carpenter # Cooper) 1, Philippines {Beeve) ? ; low water-175 fms. Fossil. Miocene, Pliocene, and Post-tertiary : Iceland, Norway and Sweden, Great Britain and Ireland, throughout continental Europe to Mogador and Rhodes, W . coast of N. America?; 0-150 ft. A small variety inhabits brackish water in the Isle of Arran. Eleven synonyms. 1. AXINUS FLEXUOSUS, Montagu. Tellina fiexuosa, Mont. Test: Brit. p. 72. Axinus flexuosus, B. C. ii. p. 247, pi. v. f. 6 ; v. p. 179, pi. xxxiii. f. 1, la. 'Lightning' Exp. St. 1, 3 (var. rotunda. More circular and symmetrical, and not so globose, having the fold or groove very slight and only perceptible on the inside; perhaps a distinct species). 'Porcupine' Exp. 1869: St. 14 (var. polygona), 25 (same variety), 18, Lough Fovle, 35, 39, 62 (var. rotunda), 40 (var. polygona), Loch Torridon. 1870 : Atlantic, 3 (var. rotunda), 9 (var. sarsii), 10 (var. polygona), Vigo B. (same variety), 13 (same va- |