Fi,'. XLVII. — C. (Macrnnypridina) castanea G. S. Brady, ?. — 1. Shell, seen from the sido; 16 X. 2. Shell, seen from 

 above; 14, i X. 3. Anterior pirt of the left valve, seen fro.n inside; the transverse strialion of the selvage is only 

 indicated; 82 X. 4. Part of the selvage along the dorsal margin of the rostral incisnr and the two medial bristles near 

 the inner edge of the ineisur; 348 X. 5. Part of the selvage just behind the rostral incisur; 348 X. 6. Ventral margin 

 of the shell: somewhat behiiul the middle of the shell: seen from inside; 504 X. 



