. Catalogue of marine Mollusca added to the fauna of the New England region during the past ten years. Mollusks. A. E. Verrill—Catalogue of Marine MolluHca. oil (240 specimens.) Off Chesapeake Bay, stations 896-900, in 31 to 300 fathoms. In 1881 it occurred at twenty-six stations, off Martha's Vineyard, in 28 to 310 fathoms. It was particularly abundant at stations 918 and 922, in 45 and 69 fathoms, (190 specimens). It is not common below 200 fathoms. Off Delaware Bay, stations 1043, 1047, in 130 and 156 fathoms. With this species, and probably belonging to it, we often took gelatinous, but ra


. Catalogue of marine Mollusca added to the fauna of the New England region during the past ten years. Mollusks. A. E. Verrill—Catalogue of Marine MolluHca. oil (240 specimens.) Off Chesapeake Bay, stations 896-900, in 31 to 300 fathoms. In 1881 it occurred at twenty-six stations, off Martha's Vineyard, in 28 to 310 fathoms. It was particularly abundant at stations 918 and 922, in 45 and 69 fathoms, (190 specimens). It is not common below 200 fathoms. Off Delaware Bay, stations 1043, 1047, in 130 and 156 fathoms. With this species, and probably belonging to it, we often took gelatinous, but rather Urm, cylindrical egg-clusters, about 20'"'" long and 4'"'" in diameter, with the eggs in several rows. Closely resembles Plenrohranchoia Nooa'-Zealandim in form and color. The latter is a littoral species. Doridella obscura Verriii. Doridella obscura Yerrill, Amer.'Journ. Sci., i, p. 408, figs. 2, 3, 1870; Rep. Invert. Anim. Vineyard Sd., in Rep. U. S. Fish Com., i, pp. 400, 664 (auth. cop., p. .370), pi. 25, fig. 173, a, b, 1874. Figure 5. Long Island Sound, near New Haven, low-water mark to 5 fathoms ; Vineyard Sound, low-water to 10 fathoms; off Block Island, station 824, 13 fathoms, 1880; Great Egg Harbor, N. J., 1 to 2 fathoms, 1872. NUDIBRANCHIATA. Issa lacera (Muller) Bergh. Triojja lojcer Loven, Index Moll. Scand. Occid. [p. 6], 1846. G. 0. Sars, op. ult. cit., p. 311, pi. 27, figs. 4, a-c, pi. xiv, figs. 12a, b. Verrill, Amer. Journ. Sci., xvi, p. 211, Sept., 1878. Issa lacera Bergli, Monog. Polyceraden, 11, p. 20, pi. 14, figs. 4-12, 1881, in Verb. K. K. Gesellsch., Wien, 1880. Plate XLII, figure 11. This was first taken on our coast in 1873, by the U. S. Fish Com- mission party on the " Bache," at Cashe's Ledge and off Cape Ann, in 25 to 80 fathoms. Off Halifax, Nova Scotia, 90 to 92 fathoms, and Massachusetts Bay, 48 fathoms, 1877 ; and off Cape Cod, in 70 fathoms, 1879. Issa ramosa VerriU and Emerton. Issa ramos


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