INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 679 



gin usiiiilly uearly straight for at least lialf its length, sometimes a little 

 convex and gradually- sloping throughout. Surface with fine, somewhat 

 irregular, concentric striaj, slightly iridescent. Color white, with the 

 umbos purple. Leugth, 4""^ ; height, 2.5-"™. 



Long Island Sound, near New Haven, 4 to C fathoms, shelly and grav- 

 elly bottom, among hydroids and sponges (A. E. V.). 



Abra wqualis Say. 



American Couch., Part iii, Plate 28 ; outer figures, 1831 ; Bhiuey's Say, p. 182, 

 same plate; StimpsoD, Cbeck-List, j). 3, 1860. Anq)hidc-sma aqudlis Say, 

 Jouru. Acad. Nat. Sci., Philadelphia, vol. ii, p. 307, 1822 ; American Conch., Part 

 iii, Plate 23; Binney's Say, pp. 100,182. SemeJe eqiutJis Verrill, Amer. .Tour. 

 Science, vol. iii, p. 210, 1872. 



Florida and Gulf of Mexico to Cape llatteras ; rare and local farther 

 north. Stonington, Connecticut, from cod-stomachs (Linsley). Fort 

 Macon, North Carolina, abundant (Coues, Yarrow). Texas (Eu?mer). 

 Charleston, South Carolina (Say). 



The occurrence of this southern species at Stonington needs confirm- 

 ation. I liave seen no specimens from north of Cape Hatteras. 



Fossil in the Miocene of North and South Carolina. 



CuMiNGiA TELLINOIDES Conrad. Plate XXX, fig. 221. (p. 418.) 



Journ. Acad. Nat. Sci., Philail., vol. vii, p. 234, 1837; Gould, Invert., ed. i, p. .5G, 

 tig. 36; ed. ii, p. 79, tig. 390. Mactra tellinoUlcs Conrad, .Touru. Acad. Nat. 

 Sci., Philad., vol. vi, p. 2.58, Plate 9, figs. 2,3, 1831. 



Cape Cod to Florida. Common in Vineyard Sound and Buzzard's 

 Bay, 3 to 12 fathoms ; I^ong Island Sound, less common. Fort Macon, 

 North Carolina (Coues, Yarrow). Florida (Conrad). Fossil in the Post- 

 Pliocene of Nantucket Islaiul, South Carolina, and North Carolina; in 

 the Pliocene of South Carolina ; and in the Miocene of Yirginia. and 

 South Carolina, 



Ceronia arctata Adams, (p. 42G.) 



H. and A. Adams, Genera, vol. ii, p. 414, 18.58 ; Gould, Invert., ed. ii, p. 80, fig. 

 391. Maclra arctata Conrad, Journ. Acad. Nat. Sci., Philad., vol. vi, p. 257, 

 Plate 11, fig. 1, 1831. Mesodesma arctata Gould, Invert., ed. i, p. .57, fig. 39. 



Long Island to liiver Saint Lawrence. Stonington, Connecticut 

 (Linsley). East Hampton and Montauk, Long Island (S. Smith). Nan- 

 tucket (Gould). Common in Massachusetts Bay ; Casco Bay, and East, 

 port, INIaine, rare. Nova Scotia (Willis). 



Donax fossor Say. 



Journal Acad. Nat. Sciences, Philadelphia, vol. ii, p. 300, 1822; Barney's Say, pp. 

 99, 22G, Plate 61, fig. 2. 

 This species may possibly occur occasionally on the Southern New 

 England coast, but I am not aware of any authentic instances. I have 

 found it quite common living on the outer beach at Great Egg Harbor, 

 New Jersey, and it has been found as far north as the southern side of 

 Long Island. 



