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Show 944 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Nov. 29, on the posterior side of the right valve, which becomes laminar towards the upper part of the rostrum ; it commences below the beak, and is connected on the side with the outer ridge or wall of the cartilage-pit: inside glossy ; edges notched by the ribs : muscular scars triangular, large, and well marked on the posterior side, and strengthened by a short upright plate. L. 0*4, B. 0*55. 'Porcupine' Exp. 1870: Atl St. 16, 17, 24-28a. DistriBution. Off Bermuda (' Challenger' Exp.), Azores ('Josephine' Exp.); 200-600 fms. May be distinguished at all ages from N. costellata by its more globular shape and much shorter rostrum, and by the greater continuity of the ribs on the posterior side. See also m y remarks in the 'Annals and Magazine of Natural History' for December 1876 in comparison of the present species with N. striata. 20. NE^RA COSTELLATA, Deshayes. Corbula costellata, Desh. Expl. Scient. Mor. (Geol.), p. 86, t. vii. f. 1-3. N. costellata, B. C. iii. p. 49 ; v. p. 191, pi. xlix. f. 3. • 'Porcupine' Exp. 1869: St. 1, 6, 10,13, 14,25,35,61. 1870: Atl. 1, 2, 3,3a, 9, 10, 13, Setubal B., C. Sagres, 26-29; Med. Cartagena B., 55, Rasel Amoush, Adventure Bank. DistriBution. Bergen to G. Egina, Adriatic, Madeira, Canaries, Jamaica?, G. Mexico? ('Blake' Exp.), N ew England; 10-250 fms. Fossil. Miocene: W . Indies? Pliocene: Belgium, N. France, Italy, Morea. Anatina radiata and A. ruggeri of Maravigna, according to Aradas and Benoit, besides other synonyms given in ' British Conchology.' 21. NE^ERA STRIATA, Jeffreys. (Plate LXXI. fig. 11.) N. striata, Jeffr. in Ann. & Mag. N . II. Dec. 1876, p. 495. ' Lightning' Exp. : St. 4, 6 (living). 'Porcupine' Exp. 1869 : St. 23 (living), 23a (fragment). DistriBution. N.Atlantic ('Valorous' Exp.), between Norway and Novaya Semblia (' Vbringen' Exp.), between the Butt of Lewis and the Faroe Isles (' Knight Errant' cruise), Bav of Biscay (< Travailleur ' Exp.), New England ? ; 85-1450 fms. Probably N. multicostata of Verrill and Smith; but I have not yet been favoured with the promised opportunity of comparing specimens. 1. CORBULA GIBBA, Olivi. Tellina gibba, Olivi, Zool. Adr. p. 101. C. gibba, B. C. iii. p. 56, pi. ii. f. 5 ; v. p. 192, pi. xlix. f. 6. 'Porcupine' Exp. 1869: St. 1, 2 (and var. rosea), 6, 9, 16, 18 (fry), Donegal B. (var.), 19 (fry), 21 (fry), 23a, 25. The Minch, Loch Torridon, off Lerwick. 1870: Atl. 10, Vigo B., 13, Setubal B., C. Sagres, 26, Tangier B.; Med. Cartagena B., 50, 55 (fry), G. Bona, Benzert Road, Rasel Amoush, Tunis B., Adventure Bank. |