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Show 1881.] ' L I G H T N I N G ' A N D ' P O R C U P I N E ' EXPEDITIONS. 699 anterior side, which is scarcely one fifth the size of the other side hinge-line rectangular, occupying about one fourth of the circumference of the shell: hinge-plate narrow: teeth in the right valve short, leaf-like and V-shaped; in the left valve laminar on each side : inside polished, with slight longitudinal strise towards the front: scars slight but large. L. 0*1, B. 0*1125. 'Porcupine' Exp. 1870: Atlantic, St. 24, 27, 30. Distribution. Bay of Biscay ('Travailleur' Exp.), 628 fms.! Algiers {Joly)\ M. Bidentata is more elliptical and not so round, the beaks are not placed so near the anterior side, and the cardinal teeth are longer and more divergent. 1. LASCEA RUBRA, Montagu. Cardium ruBrum, Mont. Test. Brit. p. 83, t. 27. f. 4. Lasa?a rubra, B. C. ii. p. 219, pi. v. f. 2 ; v. p. 179, pi. xxxii. f. 1. 'Porcupine' Exp. 1869: St. Donegal B. 1870: Atlantic, Vigo B., Gibraltar B. Distribution. Apparently world-wide, from Greenland (coll. Moller in Mus. Copenhagen) to St. Paul and Amsterdam islands {Fischer), in the Atlantic, and the Alaska Isles {Stearns) and Japan to the Strait of Magellan (Philippi), in the Pacific; shore-628 fms. Fossil. Pliocene and Post-tertiary : Norway, England and Ireland, and Italy ; 0-50 ft. Several useless synonyms. Not Kellia rubra of Gould, which is Cyamium minutum. M. Crosse, in a review of the second volume of' British Conchology' (Journal de Conchyliologie, 3C ser. t. iv. no. 2, p. 202), says that, on m y own showing, Lascea ought not to stand as the generic name, because Brown's diagnosis was insufficient, and Leach afterwards repudiated the name. But if a genus or species be described, although incompletely, in such terms as to leave no doubt as to what was meant, the name given to it by the describer takes precedence of another subsequent name, which is accompanied by a fuller description. In the present case, however, the subsequent description (that of Recluz) is worse than the first, and is likely to mislead. Brown, not Leach, was the author; and the latter had no right to repudiate or withdraw the original name without the consent of the author, who actually republished it in 1844. 2. LAS^EA PUMILA, S. V. Wood. Kellia pumila, S. V. Wood, Crag Moll. (Biv.), p. 124, t. xii. f. 15, a, b. 'Porcupine' Exp. 1869: St. 15. 1870: Atlantic, 3, 8, 9, 13, 17A, 27, 28, 30. Distribution. Bay of Biscay, Sicily, and Korea; 36-645 fms. Fossil. Pliocene : Coralline Crag, and Sicily. Monterosato proposed the generic name Zoe for this shell; but I do not consider it to be generically different from Lascea. At all 45* |