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Show 704 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [J and A. oBlongus of Monterosato. Specimens dredged in the Swedish arctic Expedition of 1868, from 550 fathoms, are of a very large size. This corroborates Mr. Norman's statement, in his ' Notes on the Oceanic Copepoda' (Nares's 'Arctic Voyage'), viz.:-" With respect to size, we find here, as in many other instances among the Inver-tebrata, an extraordinary development of the Arctic specimens, which are at least six times the size of those from the Irish coast." 8. AXINUS SUBOVATUS1, Jeffreys. (Plate LXL fig. 8.) S H E L L triangularly oval or wedge-shaped, nearly equilateral, rather convex, extremely thin, glossy, and semitransparent: sculpture none : colour whitish : margins sloping from the beak towards each end, somewhat truncate and angular on the anterior side, rounded on the posterior side, and gently curved in front : beaks small, prominent, recurved: lunule long and narrow, defined by a slightly raised ledge on both its sides: ligament narrow, somewhat projecting: hinge-line obtuse-angled : hinge-plate very narrow; teeth none, except a small point at the inner edge of the hinge-plate on the anterior side : inside polished: scars inconspicuous. L. 0*05, B. 0*075. 'Porcupine' Exp. 1869, St. 16, 30, 58. Distribution. Bay of Biscay {'Travailleur' Exp.), 1300-1408 fms. Differs from A. ferruginosus in its wedge-shaped appearance. 9. AXINUS CYCLADIUS, S. V. Wood. Kellia cycladia, S. V. Wood, Crag Moll. (Biv.), p. 122, t. xi. f. 4, a, B: B. C. ii. p. 228; v. p. 179, pi. xxxii. f. 3. 'Porcupine' Exp. 1869 : St. 19. 1870 : Atlantic, 30. Distribution. 'Valorous' Exp., Norway arctic Exp., Shetland, Falmouth and Lisbon telegraph-cable, Mediterranean, and iEgean : 30-1750 fms. Fossil. Pliocene : Coralline Crag. Variety Kellia orbicularis, S. V. Wood, which is certainly not Scacchia ovata of Philippi, as Mr. Wood doubtfully supposes. 1. DIPLODONTA ROTUNDATA, Montagu. Tellina rotundata, Mont. Test. Brit. p. 71, t. 2. f. 3. D. rotundata, B. C. ii. p. 254, pi. v. f. 7; v. p. 180, pi. xxxiii. f. 4, 4a. 'Porcupine' Exp. 1869: St. Galway B. 1870: Atl. C. Sagres; Med., Cartagena B., off Jijeli, Benzert Road, Rasel Amoush, Adventure Bank. Distribution. British coasts to iEgean, Adriatic, Canaries, and Madeira; 0-60 fms. Fossil. Miocene and Upper Tertiaries: Coralline and Red Crag, Belgium, S.W. France, Vienna Basin, Styria, Switzerland, Portugal, Italy, Greece, Rhodes, Cyprus, and Madeira. Post-tertiary: Calabria. 1 Somewhat oval. |