Bury. U.S. B. F., 1917-18. 
PLATE XIX. 
Yellow sand-shell, Lampsilis anodontoides (Lea), from Miss: 
Slough sand-shell, Lampsilis fallaciosa (Smith) Simpson, from Mississipy 
Black sand-shell, Lampsilis recta (Lamarck), from M ississippi River. 
, Lampsilis subrostrata (Say), from Mississippi River. 
ssippi River. (See p. 3 
River. 
Pp. 32. 
(See p. 32.) 
ee P. 32.) 
