SANGUINOLARIIDAE 439 



a purple flush, and with a strong splotch of purple at each end of the dorsal 

 margin. Common in shallow waters of bays along the shore. 



Genus Iphigenia Schumacher 1817 

 Iphigenia brasiliensis Lamarck Giant False Donax 



Plate 32U 



South half of Florida and the West Indies. 



2 to 2/4 inches in length, rather heavy, elongate, roughly diamond- 

 shaped in side view and moderately inflated. Posterior dorsal slope flattish. 

 Exterior smoothish, cream with a purple-stained beak area. Commonly en- 

 tirely covered with a thin, glossy, brown periostracum. Moderately common 

 in shallow water in sand. 



Family SANGUINOLARIIDAE 

 Genus Sangiiinolaria Lamarck 1799 



Sangiiinolaria cruenta Solander Atlantic Sanguin 



Plate 4od 



South Florida, the Gulf States and the West Indies. 



I % to 2 inches in length, moderately compressed, the left valve slightly 

 flatter than the right. With a slight posterior gape. Exterior glossy, smooth, 

 except for minute concentric scratches. Pallial sinus with a U-shaped hump 

 at the top. Color white with the beaks and area below a bright-red which 

 fades ventrally into white. Uncommon in the West Indies, rare in Florida. 

 5. sanguinolenta Gmelin is a later name for this species. 



Subgenus Nuttallia Dall 1898 

 Sanguinolaria mittalli Conrad Nuttall's Mahogany Clam 



Plate 29X 



Monterey, California, to Lower California. 



2% to 3% inches in length. A handsome species characterized by its 

 smooth, oval form, glossy nut-brown color, with its right valve almost flat 

 and its left valve inflated. External ligament like a brown leather button. 

 Interior whitish, commonly with rosy or purplish blush. Common near estu- 

 aries in 6 to 8 inches of mud. 



Genus Asaphis Modeer 1793 

 Asaphis deflorata Linne Gaudy Asaphis 



Plate 40a 



Southeast Florida and the West Indies. 



