382 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [C.7)] 



Blainv,, 1824:,=Macha OkeD, 1835, and undoubtedly belongs to the 

 TelUnidWj near Psammobia, as shown by the structure of the soft parts. 

 (See page 373 and Plate xxvi, fig. 181). 



TAGELUS DIVISUS. Plate XXX, fig. 218. (p. 435.) 



Dall, op. cit., p. 251, 1870. Solen divisns Spengler, op. cit., p. 96, 1794 (t. Gould). 

 Solen lidens Chemnitz, op. cit., p. 203, Plate 198, fig. 1939, 1799. Solen fra<jlU 

 Pulteney, Dorset Catal., p. 28, Plate 4, fig. 5, 1799 (t. Gould). Solen centralis 

 Say, Journ. Acad. Nat. Sci., Philad., vol. ii, p. 316, 1822. Solccurtus bidcii* 

 Forbes and Hauley, op. cit., vol. i, p. 266 ; Stimpson, Shells of New England, 

 p. 22. Solecurtus divisus Gould, Invert., ed. ii, p. 44, fig. 368. Madia divlsa 

 Gray, Catal. Brit. Moll., p. 160. Legumimiria Floridana Conrad, Proc. Acad. 

 Nat. Sci., Philad., vol. iv, p. 121, 1848. Mesoplenr bidcniata Conrad, Catal. 

 Solenidrc, Arner. Jour. Conch., vol. iii, Appendix, p. 23, 1867. 



Gulf of Mexico and West Indies to Cape Cod. Vineyard Sound and 

 Buzzard's Bay, not common. Rhode Island, rather common, (Gould). 

 Fort Macon, North Carolina, common, (Coues). Tampa Bay, Florida, 

 (Conrad, Jewett). 



MACOMA FRAGILIS Adams. Plate XXX. fig. 222. 



H. and A. Adams, Genera, vol. ii, p. 400, 1858. 



Var. fusca = Nacoma fusca, Adams, (p. 359.) 



Genera, vol. ii, "p. 400 ; Gould, Invert., ed. ii, p. 93, fig. 400. Psammobia fusca 

 Say, Jour. Acad. Nat. Sci., Philad., vol. v, p. 220, 1826. Sang iiinolaria fusca Con- 

 rad, Amer. Mar. Couch., p. 34, Plate 7, tig. 1, 1831 ; Gould, Invert., ed. i, p. (>(>, 

 fig. 42. 



Var. fragilis. 



Venus frag ills O. Fabricius, Fauna Groulandica, p. 413, 1780. Tellina Gronlan- 

 dica Beck, Lyell, in Trans. Geol. Soc., London, vol. v, p. 137, Plate 16, fig. 8, 

 1841. Macoma Gronlaudica Packard, Mem. Boston Soc., vol. i, pp. 235, 243, etc., 

 1866 ; Dawson, Notes on Post-Pliocene Geology of Canada, p. 72, from Cana- 

 dian Naturalist, vol. vi, 1872. Tdllna F<tbricii Hanley; Sowerby, Thesaurus, p- 

 112, (t.Morch). 



Georgia to Greenland. Var. fusca is abundant on the entire coast of 

 New England, Long Island, and New Jersey. Georgia (Say, Couper). 

 Yar. fragilis is abundant from Long Island Sound and Massachusetts 

 Bay to Labrador. The two forms grade into one another insensibly. 



A closely related but apparently distinct species, If. Baltliica (Linne, 

 sp.), is abundant in the Baltic and elsewhere on the northern coasts of 

 Europe, and has been regarded as identical by several writers. Another 

 similar form, inconspicua (Sowerby), occurs on the northwest coast of 

 America, but is regarded as distinct by Dr. P. P. Carpenter and others. 



As a fossil, var. fragilis is abundant in the Post-Pliocene deposits of 

 New England, New Brunswick, Canada, Labrador, and Greenland ; var. 

 fusca occurs in the Post-Pliocene of New England, Virginia, North Caro- 

 lina, and South Carolina. 



