‘hae. N Beril us: 
Vor. XI. JULY, 1897. No. 3. 
SYNOPSIS OF THE PINNIDZ OF THE UNITED STATES AND WEST 
INDIES. 
BY WM. H. DALL. 
In revising the Tertiary Pinnide it became necessary to examine 
the recent species and their synonymy. As certain changes in the 
accepted nomenclature appear necessary, the following synopsis 
may be useful. 
Family PINNID. 
Genus Pinna Linné, 1758. 
Valves medially sulcate. 
Pinna rudis (Linné) Chemn., (++ pernula Reeve non Chemn.) ; 
Bermuda, Bahamas. 
Pinna carnea Gmelin, (++ pernula Chemn. non Reeve; + degen- 
era Link, 1807; + flabellum (Lam.) Reeve, 1858; + varicosa 
(Lam.) Orb., 1853; + ? bullata (Swains.) Reeve, 1858). 
Florida Keys, north to near Hatteras and south to Trinidad ; also 
in the Red Sea. 
Genus A'rrtna Gray, 1847. 
Valves entire. 
Atrina rigida Dillwyn apud Solander, 1817, (+ pectinata Born 
non Linné; + seminuda Lam., 1819, non Reeve; + alta Sby., 
1835; -+ subviridis Reeve, 1858; + dorbignyi Hanley, 1858; + 
carolinensis Hanley, 1858; + ramulosa Reeve, 1858; + seminuda 
Holmes, 1859; +- muricata of American authors, but not of Linné 
or Reeve). 
