EXPLANATION OF PLATE XXVIII. 



Fig's I02 A and B. — Laiiipsili.s anodontoides (Lea) o"^, Chariton R., Kern. 



Fig's I02 C and D. — L. anodnntoides (Lea) 9, Chariton R., Kern. 



Fig's 103 A and B. — L. luteola (Lamarck) d" , Black R., Williatnsvillc. 



Fig's 103 C and D. — L. luteola (Lam.) 9, Black R., Williamsville. 



Fig's 103 E and F. — Young L. luteola (Lam.) cf ,- Black R., Williamsville. 



Fig's 104 A and B. — L. luteola rosacea (Dekay) c?, White R., Branson. 



Fig's 105 A and B. — L. Higginsii (Lea) 9, Miss. R., Hannibal. 



Fig's 106 A and B. — L. ventricosa (Barnes) cf, Black R., Williamsville. 



Fig's 106 C and D. — L. ventricosa (Barnes) 9, Miss. R., Hannibal. 



Fig's 107 A and B. — L. ventricoas satura (Lea) 9 • White R., Hollister. 



Fig's 108 A and B. — Truncilla Lefevrci LItterback 9, Black R-, 

 Williamsville. 



Fig's 108 C and D. — T. Lef evrei Vtierhack d" , Black R., Williamsville. 



Fig's 109 A and B. — Truncilla ciirtisi Frierson and Utterback 9, 

 White R., Hollister. 



Fig's 109 C and D.— T. Curtisi F. and U. a\ White R., Hollister. 



