ANODON,—Pate VIII. 
ventral margin sloping upwards gradually, umboes 
very gibbous; posterior side large, inflated, rayed 
above with two obscure angles, end very slightly 
acuminated, postangular area expanded, slightly 
alated, with dorsal margin elevated, and lateral mar- 
gin oblique. 
Lea, Obs. Unio, ii. pl. i. f. 1. 
Hab. Port Gibson. 
A specimen of this shell exists in the Cumingian col- 
lection about half as long again as the one figured. 
