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Show 1879.] 'LIGHTNING' A N D 'PORCUPINE' EXPEDITIONS. 559 Distribution. Christiansund to Sicily, Madeira, and the Canaries laminarian zone to 78 fms. Fossil. Upper and middle Pliocene and Post-tertiary. Scandinavia, Great Britain and Ireland, Holland, Belgium, S. France, Italy, Algeria; 0-106 ft. It is difficult to separate P. maximus from P. jacobceus. Are they distinct species ? 10. PECTEN FLEXUOSUS, Poli. Ostrea fiexuosa, Poli, Test. utr. Sic. ii. p. 161, t. xxviii. f. 11. 'Porcupine' Exp. 1870: Atl. St. 29; Med. Benzert Road, Rasel Amoush. Distribution. Loire-Inferieure, Atlantic coast of Spain, Portugal, Strait of Gibraltar, Mediterranean, Adriatic, iEgean, Madeira ; 2- 110 fms. Fossil. Miocene, Pliocene, and Post-tertiary. S. France, Algeria, and Italy. P. polymorphus of Bronn and Philippi. 11. PECTEN GLABER, Linne. Ostrea glabra, L. S. N. p. 1146. 0. citrina, Poli, Test. utr. Sic. ii. t. xxviii. f. 15. 'Porcupine' Exp. 1870 : Atl. St. 30; Med. Algesiras B., Distribution. Portugal to Smyrna, Adriatic, Black Sea, and the Crimea; 2-120 fms. Fossil. Pliocene. S. France, Algeria, Italy, Morea. Ostrea sulcata of Born, and many other synonyms. 12. PECTEN TIGRINUS, Muller. P. tigerinus, Mull. Zool. Dan. Prodr. p. 248. P. tigrinus, B. C. ii. p. 65 ; v. p. 167, pi. xxii. f. 2, 2a. 'Lightning' Exp.: St. 2, 5. ' Porcupine' Exp. 1869 : St. 23a, 33, 68, the Minch. 1870 : Atl. Setubal B. Distribution. Iceland and Norway to Vigo ; 5-180 fms. Fossil. Pliocene and Post-tertiary. Norway, Great Britain, Belgium?, Biot, Barcelona, Calabria, and Sicily; 0-130 ft. I give the Belgian localities for this and some other species with considerable hesitation, because I have not yet succeeded in having an opportunity of critically examining and comparing the Belgian fossils which bear the names of recent species. I have already shown (B. C. v. p. 175) that the Area pectunculoides of Nyst, from the " sable noir" of Antwerp, is very different from the recent species of that name, 13. PECTEN STRIATUS, Muller. P. striatus, Mull. Zool. Dan. Prodr. p. 248 : B. C. ii. p. 69 ; v. p. 168, pi. xxiii. f. 4. 'Porcupine' Exp. 1869 : St. 6, 9, Galway B., 14, 45a, 45b, 70, Little Minch, near Belfast, off Lerwick. |