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Show 1881.] 'LIGHTNING A N D ' P O R C U P I N E ' EXPEDITIONS. 923 ' Porcupine ' Exp. 1870 : Atl. St. Vigo B., Setubal B., C. Sagres, 26, 30, 36' ; Med. Algesiras B., 50, Benzert Road, Adventure Bank, off Rinaldo's Chair. DistriBution. W . Ireland and S. England to the Archipelago, Madeira, Canaries, and Azores; 12-162 fms. Fossil. Miocene : Vienna Basin, Hungary, S.W. France, Calabria, Madeira. Upper Tertiaries : S. France, Italy, Rhodes. Post-tertiary: Calabria. Erycina pusilla of Philippi. 2. AMPHIDESMA CORNEUM, Poli. Mactra cornea, Poli, Test. utr. Sic. i. p. 73, t. 19. f. 8-11. A. corneum, B. C. ii. p. 414 ; v. p. 188. 'Porcupine' Exp. 1870 : Atl. St. 26 (valve). Distribution. Carnac in Brittany (J. G. J.) to .Syria, Adriatic, Black Sea ; 0-2 fms. Fossil. Miocene : Vienna and Touraine Basins, Hungary. Upper Tertiaries : S. France, Italy. Post-tertiary : Calabria. Donax plebeia, Pennant, Amphidesma donacilla, Lamarck, Dona-cilla lamarcki, Philippi. 1. MACTRA SOLIDA, Linne. M. solida, L. S. N. p. 1126: B. C. ii. p. 415, pi. viii. f. 2 ; v. p. 188, pi. xliii. f. 2, 2a. ' Lightning' Exp. St. 5 (typical); 4, 5, 7, Faroe Isles (var. elliptica). 'Porcupine' Exp. 1869: 13, 15, Lough Foyle, 68, The Minch. 1870: Atl. Vigo B., Setubal B., C. Sagres (var. intermedia); Med. Capo de Gata (valve, var. elliptica). DistriBution. Iceland and Finmark to N.W. Spain, Adriatic (on several authorities), Mediterranean?; 0-205 fms. The typical form is littoral, the variety elliptica from deeper water. Fossil. Upper Tertiaries and Post-tertiary : Iceland, Norway, British Isles, Belgium?, Germany?, Biot, Italy ; 0-130 ft. M. vulgaris, Chemnitz, M. truncato, Montagu, M. castanea and M. crassatella, Lamarck, M. elliptica, Brown, and other synonyms for recent and fossil varieties. Not M. solida of Payraudeau, which is M. stultorum, var. corallina. 2. MACTRA SUBTRUNCATA, DaCosta. Trigonella suBtruncata, DaCosta, Brit. Conch, p. 198. M. subtruncata, B. C. ii. p. 419 ; v. p. 188, pi. xliii. f. 3. 'Porcupine' Exp. 1869: St. 9, 19 (valve). 1870: Atl. 10, Vigo B., 13, C. Sagres, 30, 36, Tangier B.; Med. Algesiras B., 50, G. Bona, Adventure Bank. Distribution. Finmark to the Morea and Black Sea, Adriatic, Mogador, Madeira 1, Canaries ? ; 0-60 fms. Fossil. Miocene: Vienna and Bordeaux Basins, Switzerland, Germany, Transylvania, Calabria. Pliocene: Coralline and Red |