1896.] NATURAL SCIENCES OF PHILADELPHIA. 501 



108. Unio asperrimus Lea. 



Reelfoot Lake, Obion Co. (68340). 



109. Unio biangulatus Lea. 



Tennessee River, above Knoxville (68361) ; Watauga River, 

 below Watauga Station (69370). 

 Described from Caney Fork. 



110. TJnio caliginosus Conr. 



Clinch River, above Patton's Ferry (69203). 

 Described from the Red River at Alexandria, La. 



HI. Unio capsseformis Lea. 



Big Harpeth River, near Bellevue, Davidson Co. (68369). 

 112 Unio circulus Lea. 



Big Harpeth River, near Bellevue (68381) ; Tennessee River, 

 near Knoxville (68362). 



An Ohio drainage species. 



113. Unio conradianus Lea. {Oo7iradicus Lea). 



Emory River, Harriman (69222) ; AVatauga River, near John- 

 son City (69226). 



The specimens are, for the greater part, only very slightly plicate 

 on the posterior slope, far less so than Lea's types. 



114. Unio cooperianus Lea. 



Tennessee River, near Williams Island, below Chattanooga 

 (68375) ; 2 miles above Knoxville (69211) ; Clinch River, above 

 Patton's Ferry (68363). 



115. Unio cornutus Barnes. 



Clinch River, above Patton's Ferry, Roane Co. (68330). 



116. Unio crassidens Lam. 



Holstou River, 1 mile above junction with Tennessee River 

 (68365) ; Tennessee River, near Knoxville (68327) ; Tennessee 

 River, near Williams Island, Chattanooga (68347) ; Clinch River, 

 above Patton's Ferry (68337). 



117. Unio cuneolus Lea. 



Emory River, Harriman (69201). 

 Described from the Holston. 



118 Unio cylindricus Say. 



Holston River, 1 mile above junction with Tennessee River 



(68342). 



