EXPLANATION OF PLATE XLVIL 



Page 



FIG 1. Edmondia aspinwallensis 126 



la. Right valve. 

 Ib. Dorsal aepect. 



Carboniferous, Upper Coal Measures. 



FIG. 2. Edmondia nuptialis 126 



Side view. (Rowley collection.) 

 Carboniferous, Burlington limestone. 



FIG . 8 . Edmondia burlingtonensis 126 



Left valve . (Rowley collection . ) 

 Carboniferous, Burlington limestone. 



FIG. 4. Allorismasp t 



Cast of left valve (Rowley collection.) 

 Carboniferous, Chouteau limestone. 



FIG. 5. Allorisma subcuneatum , 129 



5a. Dorsal view. 



5b. Aspect of left side. 



5c. Right side. 



Carboniferous, Upper Coal Measures. 



