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Show 710 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [J DistriBution. C. Breton (De Folin), throughout the Mediterranean to Egypt, Adriatic, Canaries; 0-120 fms. Fossil. Miocene and Upper Tertiaries : Coralline and Red Crag, Austrian Empire, Switzerland, S.W. and S. France, Algeria, Italy, Greece, Rhodes, Cyprus, Madeira. Post-tertiary : Calabria. Syn. C.gryphica and C. Bicornis (extyp.), Linne, C. sinistrorsa, Brocchi (not Bruguiere), C. cavernosa, Risso, G. squamata and several other so-called species of Deshayes, C. circinata, Monte-rosato. Family XIII. CYPRINID^;. ISOCARDIA COR, Linne. Chama cor, L. S. N. p. 1137. J. cor, B. C. ii. p. 298, pi. vi. f. J ; v. p. 182, pi. xxxvi. f. 1, 1 a. 'Porcupine' Exp. 1869: St. 10, 13, 15, 16, 17, 19, 25, 30, 31, 40. 1870: Atl. 2, 3, 8, 9, 13, 16, 17, 17«, C. Sagres, 26-30, 36 ; Med. Capo de Gata, 45, 50, 50 a, off Jijeli, 55, Rasel Amoush, Adventure Bank. DistriBution. N. Atlantic from Loffoden Is. to the Azores, Mediterranean, Adriatic, ' Valorous' Exp.; 4-1785 fms. Fossil; adult and fry. Miocene and Upper Tertiaries: Coralline and Red Crag, Antwerp Crag, Continental Europe, S. France, Italy, Algeria, Greece, Asia Minor. Post-tertiary : Scandinavia, Calabria ; 0-80 ft. The fry or very young is the Kellia aByssicola of Forbes, Venus ? miliaris of Philippi, and Kelliella aByssicola of Sars. I have occasionally found it with the adult, and could satisfy any one by showing him a complete and connecting series. The fry is nearly globular, white, smooth and glossy : the shape gradually and in course of growth changes to squarish ; the colour becomes streaked with reddish-brown ; and the surface is covered with a fine pilous epidermis, which is composed of short setae arranged lengthwise in close-set rows. The adult is somewhat angular ; and the epidermis is very thick and velvety, although still retaining the longitudinal setje. In every state the shell is more or less tumid. The teeth are developed by degrees. In all probability the fry, when protruded from the ovary, swims or floats for a time on the surface of the sea, like the fry of the oyster, and thus occurs at all depths. Homes has united with this species I. lunulata and I. crassa of Nyst, I. rustica of Conrad (from the American Miocene formation), and J. fraterna of Say. But these identifications require further examination. CYPRINA ISLANDICA, Linne. Venus islandica, L. S. N. p. 1131. C. islandica, B. C. ii. p. 304, pi. vi. f. 2 ; v. p. 182, pi. xxxvi. f. 2. 'Porcupine' Exp. 1869 : St. 2 (living), 9, 28, Lough Swilly, 58. DistriBution. Iceland to Arcachon,andN.E. America; 0-100 fms. Fossil. Upper Tertiaries and Post-tertiary: Europe, Siberia' Baring Land, and N.E. America ; 0-1360 ft. |