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Show 1879.] 'LIGHTNING'AND'PORCUPINE' EXPEDITIONS. 557 Distribution. Arctic seas in both hemispheres, southwards to Bergen and Connecticut, N. Japan ; 2-150 fins. Fossil. Pliocene and Post-tertiarv. Scandinavia, Scotland, Russia, Gulf of Naples (B. C. v. p. 166), "Messina ; 20 fms.-470 ft. 4. PECTEN PES-FELIS, Linne. Ostrea pes-felis, L. S. N. p. 1146: Chemnitz, Conch.-Cab. vii. t. 64. f. 612, t. 65. f. 613. ' Porcupine ' Exp. 1870 : Tangier B. (young). Distribution. G. Gascony to Morocco, Mediterranean, Adriatic, iEgean, Madeira, and Canaries, ' Challenger' Exp. (Fiji Islands); 18-110 fms. Fossil. Pliocene, Italy, Morea, and Rhodes. 5. PECTEN PES-LUTREE, Linne. Ostrea pes-lutree, L. Mant. Plant, p. 547. P. septem-radiatus, B. C. ii. p. 62; v. p. 166, pi. xxiii. f. 1, la. 'Lightning' Exp. : St. 2, 4, off Faroe I. (very large valve). 'Porcupine' Exp. 1869 : St. 3, 6, 15, 23, 23a, 25, 65. 1870: Atl. 1, 2, 3, 6 (var. alba), 8, 9, 10, 13, 16, 17, 26-30; Med. Capo de Gata, Cartagena B., G. Bona, Benzert Road, Rasel Amoush, G. Tunis, Adventure Bank, off Rinaldo's Chair. Distribution. Finmark to the Sea of Marmora, and the Adriatic ; 10-300 fms. Fossil. Pliocene and Post-tertiary. Scandinavia, Great Britain and Ireland, Belgium, Vienna Basin, S. France, Africa, Italy, and Rhodes; 0-440 ft. There are at least a dozen synonyms for this variable species, including P. septemradiatus, Muller, Ostrea infiexa, Poli, and dumasii, Payraudeau. The last named variety agrees more nearly with Linne's description of Ostrea pes-lutree in having very small ears, " Auriculee vix ullae s. altera minuta." The Linnean name appears to have been first recognized and adopted by the late M. • Gay in his 'Catalogue des Mollusques du Departement du Var,' 1858. The editors of tbe 'Journal de Conchy liologie' object to compound names of species ; but we have the great authority of Linne for many such names. As to the names of species derived from English persons, unnecessary confusion is avoided by using their ordinary compound names, e.g. Wyville-Thomson, the simple surname Thomson being very common and belonging to several naturalists. 6. PECTEN SULCATUS, Muller. P. sulcatus, Mull. Zool. Dan. Prodi*, p. 248. P. aratus, B. C. ii. p. 64 ; v. p. 167, pi. xcix. f. 5. * Lightning ' Exp.: Station 4. ' Porcupine ' Exp. 1869: St. 13, 14, 25, 65. 1870: Atl. 1, 2, 3 24-30 ; Med. 45, Capo de Gata, Adventure Bank. In some specimens as well from the Atlantic as from the Mediterranean, the ribs are more knotty or tuberculous than in others. |