UPPER TENNESSEE DRAINAGE. 577 
This may be only a variety with purple nacre of E. trabalis, but 
I have not yet seen any intergrades. 
It is characteristic for the Clinch River, where it is not rare in 
Virginia (from Speer’s Ferry, Scott Co., up to Cedar Bluff, Taze- 
well Co.). In addition, it is in the Powell at Olinger, Lee Co., Va. 
(Walker coll.); in the North Fork Holston, from Rotherwood, 
Hawkins Co., Tenn., to Mendota, Washington Co., Va.; and in 
Emory River, Harriman, Roane Co., Tenn. 
In the Tennessee and Holston proper, and their eastern mountain 
tributaries, no trace of this species has ever been found. 
Type locality: Tennessee. 
67. EURYNIA NEBULOSA (Conrad), 1834. 
Unio nebulosus Conrad,’34.—Unio cumberlandianus Lea,’36.—Unio 
cumberlandicus Lea, ’38—Umio notatus Lea, ’38—Unio glaber 
Lea, °38—Unio creperus Lea, ’°38—Unio muehlfeldianus Lea, 
°38.— Unio simus Lea, ’38.—Unio obscurus Lea, ’38.—Unio zeig- 
lerianus Lea, ’38—Unio amenus Lea, ’40.—Unio fatuus Lea, 
’40.—Umnio dactylus Lea, ’40——Umio tener Lea, ’40——Unio regu- 
laris Lea, ’41.—Unio puniceus Haldeman, ’42—Unio radians 
Lea, ’°57.—Unio jonesi Lea, ’59.—Unio discrepans Lea, ’60.— 
Unio scitulus Lea, ’60.—Umnio lingueformis Lea, ’60.—Unio per- 
pictus Lea, ’60—Unio planicostatus Lea, ’60.—Unio sparus Lea, 
68.—Unio dispansus Lea, ’71—Unio glaber, iris, cumberlandi- 
anus, jonest, sparus Lewis, ’71, and ’72.—Unio muhlfeldtianus 
Pilsbry & Rhoads, ’96—Eurynia nebulosa, dispansa, and plani- 
costata Ortmann, ’13), p. 311.—Eurynia nebulosa Goodrich, 13, 
p. ’94.—Euryma (Micromya) nebulosa Ortmann, 715, p. 64 
(anatomy ). 
Simpson, ’14, has recognized the identity of a great number of 
these nominal “ species,’ but not of all of them. He gives (pp. 119 
and 120) : cumberlandianus (Cumberland R., Tenn.) ; notatus (Cum- 
berland and Holston R., Tenn.) ; glaber (Holston R., Tenn.) ; radians 
(Othcalooga Cr., Gordon Co., Ga.) ; jonesi (Euharlee Cr., Ga.) ; dis- 
crepans (North Alabama) ; scitulus (Tuscumbia, Ala.) ; lingueformis 
(Columbia, Ga., and French Broad R., Tenn.) ; perpictus (Bull R. 
