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Show 938 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Nov. 29, Syn. N. pellucida of Stimpson, N. ardiniana of Biondi?, according to Monterosato ; var. N. glacialis of G. 0. Sars. Not N. oBesa of S. V. Wood. 5. NE^ERA CUSPIDATA, Olivi. Tellina cuspidata, Olivi, Zool. Adr. p. 101, t. iv. f. 3. N. cuspidata, B. C. iii. p. 53, pi. ii. f. 4; v. p. 191, pi. xlix. f. 5. 'Porcupine' Exp. 1869: St. 1, 6, 9, 13, 23a, 25 (var. curta), 55, 61, 68, 69, Little Minch, off Lerwick. 1870: Atl. 10 (var. curta), 13 (var. curta), C. Sagres, 36 (and var. curta) ; Med. Capo de Gata, 55 (fragment), G. Bona, Benzert Road, Rasel Amoush, Adventure Bank, off Rinaldo's Chair (and var. acutalis, smaller, running to a point). DistriBution. S. Greenland, Spitzbergen, and Finmark to the iEgean and Adriatic, Madeira, Canaries, China Sea?; 12-733 fms. Fossil. Miocene: Vienna Basin, Baden, S. France. Pliocene : Coralline Crag ?, Belgium, Italy. Post-tertiary: Norway, Calabria; 0-50 ft. 6. NE^ERA GRACILIS1, Jeffreys. (Plate LXX. fig. 11.) S H E L L forming a rather long oval, convex, not very thin, opaque, lustreless: sculpture, slight and irregular but numerous strise in the line of growth, which become wrinkled towards the rostrum : colour whitish : epidermis slight, caducous : margins rounded on the anterior side, gently curved in front; posterior side or rostrum broad, abruptly terminating, somewhat keeled or angular, and having the strise in this part arranged lengthwise or at a right angle to the concentric strise; dorsal margin incurved; Beaks mamillar, slightly inflected towards the anterior side ; umbones small, but prominent, and projecting behind: cartilage-pit small, oblique, and sunken : hinge-line raised on the anterior and incurved on the posterior side: hinge-plate folded back on the anterior and thickened on the other side: teeth, a triangular and nearly upright lateral, continuous with the cartilage-pit on the posterior side of the right valve : inside glossy: scars irregularly triangular. L. 0*4, B. 0*6. 'Porcupine' Exp. 1870: Atl. St. 16. A perfect but dead specimen. Differs from N. rostrata in being more compressed, and in having a short, broad, and keeled rostrum, which is not, as in that species, abruptly pinched up and elongated. I should have preferred the specific name elegans for the shell which I have now described; but it has been used by Mr. Hinds for a species from the ' Sulphur' Expedition. 7. NE,ERA ROSTRATA, Spengler. Mya rostrata, Spengl. in Skrivt. Selsk. iii. p. 42, t. ii. f. 16. N. rostrata, B. C. iii. p. 51; v. p. 191, pi. xlix. f. 3. 'Porcupine' Exp. 1869 : St. 1, 6, 10, 13, 14, 18, 25, 61. 1870 : 1 Slender. |