UPPER TENNESSEE DRAINAGE. 565 



47. Obliquaria reflexa Rafinesque (1820). 



Obliquaria reflexa Rafinesque, '20.— Uiiio cornntus Lewis, '71. — 

 Unio cornuttis Pilsbry & Rhoads, '96. — Obliquaria reflexa Ort- 

 mann, '12b, p. 310 (anatomy). — Obliquaria reflexa Simpson, '14, 

 P- 330. 



Only in the larger rivers. Tennessee below Knoxville (Lewis), 

 and at Ratliburn, Hamilton Co., Tenn. (Walker coll.). Lower 

 Clinch, Patton's Ferry, Roan Co., Tenn. (Pilsbry & Rhoads). I 

 found it in the Clinch at Solway, Knox Co. ;, Edgemoor and Clinton, 

 Anderson Co., Tenn. In the Walker coll. is a specimen from below 

 Agee, Campbell Co., Tenn. 



Type locality: Kentucky River and Letart Falls (according to 

 Vanatta, the types are from the latter place, below Parkersburg, 

 W. Va.). 



Genus: Cyprogenia Agassiz (1852). 

 Ortmann, 12b, p. 312. 



48. Cyprogenia stegaria (Rafinesque), 1820. 



Obovaria stegaria Rafinesque, '20.- — Unio irroratus Lewis, '71. — 

 Unio irroratus Pilsbry & Rhoads, '96. — Cyprogenia irrorata Ort- 

 mann, '12b, p. 312 (anatomy). — Cyprogenia irrorata Simpson, 

 '14, p. 326. — Cyprogenia stegaria A^anatta, '15, p. 554. 



Known from the Tennessee below Knoxville (Lewis), and the 

 Holston, at Boyd Island, Knox Co. (Pilsbry and Rhoads). It is also 

 in the Tennessee at Rathburn, Hamilton Co., Tenn. (Walker collec- 

 tion) . I traced it up, in the Holston, to Turley Mill, Grainger Co., 

 Tenn. ; and in the lower Clinch it is quite abundant, going up to Oak- 

 man, Grainger Co., Tenn. 



Type locality: Ohio River. 



Genus: Dromus Simpson (1900). 

 Ortmann, '12b, p. 314. 



