444 American Se ash ells 



Genus Solen Linne 1758 

 Similar to Ensis, but with only a single tooth at the end of each valve. 



Solen sicarius Gould Blunt Jackknife Clam 



Plate 29V 



British Columbia to Lower California. 



2 to 4 inches in length, 4 times as long as wide. Exterior with a varnish- 

 like, olive to greenish periostracum. Moderately common in certain local- 

 ities, especially sandy mud flats. Also dredged in 25 fathoms. 



Solen viridis Say Green Jackknife Clam 



Plate 3011 



Rhode Island to northern Florida and the Gulf States. 



About 2 inches in length, about 4 times as long as wide; dorsal edge 

 straight, ventral edge curved. Hinge with a single projecting tooth at the 

 very end of the valve. Color white; periostracum thin, varnish-like, light 

 greenish or brownish. Moderately common in shallow-water sand flats. 



Solen rosaceiis Carpenter Rosy Jackknife Clam 



Santa Barbara, California, to A4azatlan, A^exico. 



I to 3 inches in length, almost 5 times as long as wide. Shell fragile, with 

 a thin, glossy, olive periostracum. Beachworm specimens are whitish with 

 rosy stains inside and out. It is more cylindrical, the anterior extremity is 

 more rounded and narrower than in sicarius. An abundant species along the 

 sandy shores of bays. Also to 25 fathoms. 



Genus Solecurtus Blainville 1825 



Quadrate to rectangular in shape; gaping at both ends. With weak, 

 "clapboard" sculpturing. Ligament prominent, external and posterior to the 

 small beaks. Right valve with 2 strong, horizontally jutting cardinal teeth 

 just under the centrally located beaks. Left valve with i cardinal. Fsavt- 

 mosolen Risso 1826 is a synonym. 



Solecurtus cutningianus Dunker Corrugated Razor Clam 



North Carolina to south half of Florida to Texas. 



I to 2 inches in length with characters of the genus. Color all white, 

 with a dull, yellowish-gray periostracum. Outer surface sculptured with 



