SYi^OPSIS OF THE SOLENID.E OF XORTH AMERICA AIID 



THE ANTILLES. 



By William H. Dall, 



Curator, Division of Mollusls. 



In revising the group for the j)urpose of monographing the fossil 

 sj)ecies so many changes in nomenclature and distribution were found 

 to be involved that it was thought the following summary would prove 

 useful to students of the recent forms: 



EAST AMERICAN SPECIES. 



Genus SOLEN (Linnaeus, 17B8) Scopoli, 1777. 



( Vagina Megerle, 1811 ; + Hypogcp.a and Syjwgwoderma Poll, 1791-1795 ; + Lisfera, 

 Leach inanuscript, Gray, 1852.) Type, Solen maryinaius Pulteuey. 



1. Solen viridis Say, 1822; Ehode Island (Totten) to Georgia (Postell). 



Section SOLENA Moreh, 1852. 



(Solena sp. Browne, nonbinomial, 1756; + Hypogella Gray, 1854.) Type, S. 

 ohliqua Spengler = S. amhiguus Lamarck. 



2. Solen (Solena) ohliqua Spengler, 1793; Cuba, Porto Rico, St. 

 Thomas. 



8. rudis Sowerby, 1874, not C. B. Adams, 1852; -\- pliilippinarum 

 Sowerby, 1874, not Hanley, 1843, are synonymous. 



Genus ENSIS Schumacher, 1817. 

 (^ji.sateZ^aSwainson, 1840, -f- Solen Leach, 1852.) Type, Ensismagnus Schumacher. 



1. Unsis directus Conrad, 1843; Labrador to Indian Key, Florida. 

 Pliocene to recent. 



U. " americana Beck " of H. and A. Adams, 1856, is probably a manu- 

 script name. Solen siliqua Chickering, 1855, not Linneeus, 1758, is a 

 synonym. This species was generally confounded with Solen magnus 

 of Schumacher, under the name of Solen ensis Linnteus, by the earlier 

 American authors. 



Proceedings U. S, National Museum, Vol. XXII— No. 1185. 



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