EXPLANATION OF PLATE XXV. 



Fig's <Si A and B. — Ellipsaria clintoiiesnsis (vSimpson) 9, White R., 

 Hollister. 



Fig's 82 A and B.— Ohliqiiaria reflexa Raf. & , Platte R., Platte R. vSta. 



Fig's 82 C and D., — O. reflexa Raf.- 9, Osage R., Mor.egaw Springs. 



.Fig's 82 E and F. — Juvenile reflexa. — Crow's Fork, Fulton. 



Fig's 83 A and B. — Cyprogenia Aberti (Conrad) 9, vSt. Francis R., 

 Greenville. 



Fig's 84 A and B. — Obovaria {Pseudoon) eltipsis (Lea) 9, Grand R., 

 Sumner. • 



Fig's 85 A and B. — Nephronaias ligamentina (Lamarck) 9, Meramec 

 R., Fern Glen. 



Fig's 86 A and B. — A'^. ellisijormis (Conrad) (^ , Osage R., Warsaw. 



Fig's 86 C and D. — N. ellipsiformis (Con.) 9 , Niangua R., Hahatonka. 



•Fig's 87 A and B. — N. Pleasii (Mar.sh) 9, White R., Branson. 



Fig's 87" C and D. — N. Pleasii (Marsh) cf , White R., Branson. 



Fig's 88 A and B. — Amygdalonaias truficata (Raf.) cT, Osage R., Schell 

 City, Mo. 



Fig's 8g A and B. — A. donacijonnis (Lea) cT, Grand R., Gallatin. 



Fig's 89 C and D. — A. do)iaciformis (Lea) 9, One-and-Two R., St. 

 Joseph. 



