VI. — Second Catalogue of Mollusca recently added to the Fauna of the New England Coast and the adjacent parts of the Atlantic, consisting mostly of Deep-Sea Species, with Notes on others previously recorded. By A. E. Verrill. [Published by permission of tlie U. S. Fish Commission.] The following paper was originally intended to form merely a brief supplement to the Catalogue published by nie, in 1882, in Vol. V. of these tx-ansactions, to include such con-ections and additions as had been noticed up to date. But the discovery of a very large number of interesting additional species, many of them new, during the deep-sea dredging cruises of the Fish Commission Steamer, Albatross, in 1883, made it desirable to extend the paper so as to include many of the more important of these discoveries. This has caused delay in the printing of the paper and much increased its length, and, as I hope, its value. Many of the additions made in 1883 are from much deeper water than we had pi-eviously explored (1,000 to 2,900 fath-oms), and consequently from a greater distance at sea; so that these cannot properly be regarded as pertaining particularly to the " New England fauna." They belong rather to the general deep-sea fauna of the western Atlantic. Others are from the deep waters of the con-tinental slope, beneath the Gulf Stream, in 100 to 600 fathoms. As these deep-sea forms are likely to extend all along our coast, at simi-lar depths, and even to foreign waters, I have not thought it desir-able to exclude from this paper any deep water species because of its having been taken even as far south as off Cape Hatteras, which was nearly the southern limit of the dredgings of the Albatross in 1883. But I have excluded the strictly southern shallow water forms, dredged at moderate depths off the coasts of North Carolina and Virginia, though many of them are new additions to the fauna of our coast. There are, doubtless, to be added to our list many species of small and difficult shells, belonging to certain groups that have not yet been fully examined, or of which we have taken only imperfect examples. These will chiefly belong to the Bidlidm, Turhonilla, Odostomia, Cryptodon ^ and Yoldia. I am greatly indebted to the skill of Mr. J. H. Emerton for the unusually accurate illustrations, and to the U. g. Fish Commission for the privilege of using them in this place. Trans. Conn. Acad.. Vol. VI. 18 April Vl, 1884.
Second catalogue of Mollusca recently added to the fauna of the New England coast and the adjacent parts of the Atlantic, consisting mostly of deep sea species, with notes on others previously recorded