UPPER TENNESSEE DRAINAGE. 587 



78. Truncilla lenior (Lea), 1843. 

 Unio lenior Lea, '43. — Truncilla lenior Simpson, '14, p. 11. 



A rare species. I have found it in the Clinch, Speer's Ferry^ 

 Scott Co., Va. ; in North Fork Holston, Rotherwood, Hawkins Co., 

 Tenn. ; in South Fork Holston, Factolus, Sullivan Co., Tenn. ; and in 

 the uppermost Holston proper, Church Hill, Hawkins Co., Tenn. 



There are specimens in the Walker coll. (from Mrs. Andrews), 

 labeled: Holston River, Knox Co. (probably Tennessee River), but 

 Lewis has not recorded it from these parts. For the rest, it is miss- 

 ing in this region, but it turns up again in the Tennessee drainage in 

 North Alabama : Simpson gives it from Paint Rock River, Wood- 

 ville, Jackson Co., Ala., and the Carnegie JMuseum possesses quite a 

 number of specimens from this river at Paint Rock, Holly Tree, and. 

 Trenton, Jackson Co., Ala. 



The male of this species may be easily recognized by the fine 

 denticles on the margin of the posterior end; for the rest, it looks 

 like a pale-colored Eurynia nebulosa. 



Type locality: Stones River, Tenn. (Cumberland drainage; but 

 missing in the list of Cumberland shells published by Wilson & 

 Clark, '14). 



79. Truncilla haysiana (Lea), 1833. 



Unio haysianus Lea, '33. — Unio haysianus Lewis, '71. — Unio hay si- 

 anus Pilsbry & Rhoads, '96. — Truncilla haysiana Ortmann, '12b, 

 p. 357 (anatomy). — Truncilla haysiana Ortmann, '13&, p. 311. — 

 Truncilla haysiana Goodrich, '13, p. 95. — Truncilla haysiana 

 Simpson, '14, p. 16. 



Widely distributed, but always only in small numbers at a given- 

 locality. Tennessee in Knox Co. (Lewis) and at Knoxville (Pilsbry 

 & Rhoads) ; Little Tennessee, Coytee, Loudon Co., Tenn. (Walker 

 coll.) ; in the Powell, up to Pennington Gap, Lee Co., Va. ; in the 

 Clinch, up to Raven, Tazewell Co., Va. ; in the Holston, it goes in 

 the North Fork to Hilton, Scott Co., Va., and in the South Fork to 

 Pactolus, Sullivan Co., Tenn. 



Type locality: Cumberland River. 



