INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 641 

 Tritia trivittata Adams. Plate XXI, fig. 112. (p. 354.) 



H. and A. Adams, Genera of Recent Mollusca, vol. i, p. 122, 1858. Nassa trivittata 

 Say, Journal Acad. Natural Sciences, Philadelphia, vol. ii, p. 231 ; Gould, Invert, 

 of Mass., ed. ii, p. 364, fig. 632. Buccinum trivittatum Adams, Boston Journal 

 of Nat. Hist., vol. ii, p. 265 ; Gould, op. cit., ed. i, p. 309, fig. 211. 



Gulf of Saint Lawrence to IS^orthern Florida. Eastport, Maine, and 

 Bay of Fundy, 3 to 30 fathoms, not abundant ; Casco Bay, 1 to 40 fathoms, 

 abundant J Vineyard Sound and Buzzard's Bay, to 14 fathoms, abundant ; 

 off Block Island, 29 fathoms j Long Island Sound, common. Gasp6, 

 Canada (Dawson). Fossil in the Post-Pliocene of Point Shirley, Mass., 

 Nantucket (Desor), Gull Island (Smith), Virginia, South Carolina, and 

 North Carolina ; in the Pliocene of South Carolina j and in the Miocene 

 of Maryland, Virginia, and South Carolina. 



Ilyanassa obsoleta Stimpson. Place XXI, fig. 113. (p. 468.) 



American Journal of Conchology, vol. i, p. 61, Plate 9, figs. 11, 12, 1865. Nassa 

 obsoleta Say, Journal Acad. Nat. Sciences, Philadelphia, vol. ii, p. 232, 1822 ; Bin- 

 ney's Say, p. 77, 1858 ; Gould, Invertebrata of Mass., ed. ii, p. 362, fig. 631 ; Bu^ 

 cinum obsoletum Gould, Invert, of Mass., ed. i, p. 308^ fig. 210 ; Tritia obsoleta 

 H. and A. Adams, Genera, p. 122, 1858. 



Eastern and southern coasts of the United States; northward to 

 Oasco Bay, Maine, and the mouth of the Kennebeck River, and local in 

 the southern part of the Gulf of Saint Lawrence; southward to Florida 

 and the northern shores of the Gulf of Mexico. Extremely abundant 

 on the whole coast south of Cape Cod ; more local farther north, and 

 mostly restricted to sheltered bays and harbors. It has not been found 

 on the eastern part of the coast of Maine nor in the Bay of Fundy. An 

 isolated colony of this species is found on the western and southern 

 shores of the Gulf of Saint Lawrence and Prince Edward's Island (Bell, 

 Dawson). 



As a fossil it has been found in the Post-Pliocene deposits at Point 

 Shirley, in Chelsea, Massachusetts (Stimpson) ; at Nantucket Island 

 (Desor) ; Virginia; and South Carolina. It is also reported from the 

 Pliocene of South Carolina. 



Urosalpinx cinerea Stimpson. Plate XXI, fig. 116. (p. 306.) 



American Journal of Conchology, vol. i, p. 58, Plate 8, figs. 6 and 7, 1865. Fusus 

 cinereus Say, Journal Academy Nat. Science, Philadelphia, vol. ii, p. 236, 1822 ; 

 American Conchology, Plate 29, 1831. Buccinum plicosum Menke, Syn., ed. ii, 

 p. 69, 1830, (t. Gould) ; Gould, Invertebrata of Mass., ed. i, p. 303, fig. 213. 

 Buccinum cinereum Gould, op. cit., ed. ii, p. 370, fig. 637. 



Eastern coast of the United States; northward to Massachusetts Bay, 

 and local farther north, to the Gulf of Saint Lawrence ; southward to 

 Georgia and Northern Florida, and on the west coast of Florida, at 

 Tampa Bay. Abundant in Vineyard Sound, Buzzard's Bay, Long 

 Island Sound, and along the coast of the Middle States, especially on 

 oyster-beds. In Vineyard Sound it occurs from above low-water mark 

 to 8 fathoms. It occurs in some of the shallow and sheltered branches 

 S. Mis. 61 41 



