PLATE XXXIV. 



Pago. 



Unio radiatoides Lea 245 



Figs. 1-3. Views of three rtiiieieiit exiiniplfs of ilie species showing slight variatiousiu form 

 aud condition of preserviit iou. 



Unio nasutoides Lea 2U 



Fig. 4. Left view of one of the best jircscrved individuals of this species. 



5. Cardinal view of same. The valves are separated to a considerable extent along 

 the base, giving an appearance nf greater depth than it actually possesses. 



Unio alatoides Lea 249 



Fig. 6. Outline cardinal view of the specimen shown on Plate xxNiii, fig. 3. 



Unio Roanokoides Lea 24(3 



Fig. 7. Outline cardinal view of the specimen, Plate xxxiii, tig. 2. 



Unio ligamentinoides Lea 249 



Fig. 8. Ontliue cardinal view of the speeinicu, Plate xyxii, fig. 4. 



336 



