PLATE XXXII. 



Page 



v5(' 



Unio rectotdes Whitfield - 



Fig. 1. Cardinal view of the type. 



2. Right side of the type. .^^^ 



Unio cariosoides Lea 



Fig. 3. View of the right side of the type specimen. ^^^^^ 



Unio ligamentinoides Lea - ^ z ^i t ? \ 1 



Fig. 4. Right side of a specimen identified with this species. For hgnrc of Mr. Lea s t^pe 



"^ see Plate XXXI, Fig. L ^^^^ 



Unio subrotundoides Lea ' 



Fio-. 5. View of the left side of Mr. Lea's type. 



332 



