IINIO.— Plate XXXII. 



cmic, Ittlfrt' anlico brevi, nmplo, -luperiie snbniigulato, 

 latere postico ohlonijo, suUruncato, angidalo, margine j 

 dorsali declivi, margii/e terminali obliqtie iruiicalo, 

 ad angidum acuminalo, margins Vfntrali ante atigiduiii \ 

 excava/o. 

 The cut Unio. Shell rather square, transversely sul- [ 

 rated, compressed, pale-rose within, brown-blackish | 

 witlio\it, anterior side short, full, with a slight angle 



above, posterior side oblong, subtruncate, angular, 

 dorsal margin sloping, terminal margin obliquely 

 truncated, acuminated at the angle, ventral margin 

 excavated in front of the angle. 



Lea, Unio v. p. 31. pi. xxi. f. 33. 



Hab. West Florida ; Major Leconte. 

 Deeper, darker, less compressed and less excavated at 



the ventral margin than U. negatiis. 



