564 ORTMANN—NAYADES OF 
phaseolus Ortmann, ’12), p. 306 (anatomy ).—Ptychobranchus 
phaseolus Goodrich, ’13, p. 94—Ptychobranchus phaseolus Simp- 
son, “14, p. 333.—Ellipsaria fasciolaris Frierson, ’I4a, p. 7.— 
Ptychobranchus fasciolaris Vanatta, ’15, p. 554. 
Widely and uniformly distributed over the upper Tennessee 
region, but nowhere in great numbers. In the Tennessee, French 
Broad, Holston, Clinch, lower Emory, and Powell. It goes up, in 
the Powell, to Pennington Gap, Lee Co., Va.; in the Clinch, to Cleve- 
land, Russell Co., Va.; in North Fork Holston, to Mendota, Wash- 
ington Co., Va.; in South Fork Holston, to Emmett, Sullivan Co., 
Tenn. It is one of the species which has been reported from French 
Broad River, at Asheville, Buncombe Co., N. Car. It has not yet 
been found in Little River, Little Tennessee, and Hiwassee, but it 
is in South Chickamauga Creek, at Ringgold, Catoosa Co., Ga. 
Type locality: “ Ohio, Wabash, Kentucky rivers.” (The type is 
from Kentucky River, according to Vanatta.) 
46. ELLIPSARIA SUBTENTA (Say), 1825. 
Unio subtentus Say, ’25——Unio subtentus Lewis, ’71—Unio sub- 
tentus Pilsbry & Rhoads, ’96.—Ptychobranchus subtentus Ort- 
mann, *12b, p. 308 (anatomy ).—Ptychobranchus subtentus Ort- 
mann, “130, p. 311—Ptychobranchus subtentus Goodrich, ’13, p. 
94.—Ptychobranchus subtentum Simpson, TAs Passo: 
Known from Tennessee, Powell, Clinch, Holston, and Nolichucky 
rivers, but more abundant toward the headwaters, and rather rare 
in the big rivers.. Goes up to Big Stone Gap, Wise Co., Va.; to 
Cedar Bluff, Tazewell Co., Va.; and to Smyth Co., Va. (in North 
and Middle Fork Holston). Also in Big Mocassin Creek, in Scott 
Co;, Va." Thusat ascends, in the smal] streams, father than 2- 
fasciolaris. In the headwaters it is locally quite abundant. 
Type locality: North Fork Holston River (Say says in South 
Carolina, but this is in Virginia) (topotypes examined). 
Genus: OBLIQUARIA Rafinesque (1820). 
Ortmann, ’120, p. 300. 
