582 ORTMANN—NAYADES OF 
French Broad and lower Nolichucky (Hamblen Co.) ; all the way 
up the Holston to the North Fork at Rotherwood, Hawkins Co., 
Tenn. Also in the Clinch up to St. Paul, Wise Co., Va., and the 
Powell up to Combs, Claiborne Co., Tenn. 
Type locality: Lake Erie (topotypes examined). 
Note: The Lake Erie form differs somewhat from that of the 
central basin. If it should be found to be desirable to express this 
in nomenclature, FE. recta should be reserved for the lake form, and 
E. recta latissima (Rafinesque), ’20, should be used for the other. 
Genus: Lampsixis Rafinesque (1820). 
Ortmann, ’12), p. 345. 
70. LAMPSILIS VIRESCENS (Lea), 1858. 
Unio virescens Lea, ’58.—Lampsilis virescens Simpson, ’14, p. 93. 
I am not quite satisfied as to the proper position of this species 
within the genus Lampsilis. According to external appearance, it 
seems to be related to L. Juteola (Lam.), although it also has some 
features, which resemble those of L. teres (Raf.) (=anodontoides 
Lea). In either case, however, it would be a Lampsilis. 
The type locality is Tennessee River, Tuscumbia, Colbert Co., 
Ala., and it has been reported, by Call, from Spring Creek at Tus- 
cumbia. The Carnegie Museum has it from tributaries of the Ten- 
nessee in northern Alabama (Paint Rock River, and Bear Creek). 
It has never been found anywhere else. 
But I have found a few specimens (all males) in Emory River, 
at Harriman, Roane Co., Tenn., and in the Walker collection are 
others from Coal Creek, Anderson Co., Tenn. These two streams 
are not far apart, and flow from Walden Ridge to the Clinch. 
Emory River is the only western tributary which completely cuts 
through Walden Ridge and drains, in its headwaters, a section of 
the Cumberland Plateau. 
71. LAMPSILIS OVATA (Say), 1817. 
Unio ovatus Say, ’17——Unio ovatus Lewis, ’71—Unio ovatus Pils- 
bry & Rhoads, ’96—Lampsilis ovata Ortmann, ’12b, p. 350 
(anatomy ).—Lampsilis ovata Simpson, ’14, p. 48. 
