558 ORTMANN—NAYADES OF 
Big Creek, Hawkins Co., Tenn. (to Holston) ; Long Creek, Cocke 
Co;, Lenn. (to French Broad); Little Piceon’ River, Sevier (Gos 
Tenn. (to French Broad) ; First Creek and Third Creek, Knox Co., 
Tenn. (to Tennessee); Piney River, Rhea Co., Tenn. (to Ten- 
nessee) ; Conasauga .Creek, Monroe Co., Tenn. (to Hiwassee) ; 
South Chickamauga Creek, Catoosa Co., Ga. (to Tennessee). 
Thus this species has practically a universal distribution in our 
region, but it strictly avoids larger streams. 
Type locality: Small streams of the Knobs, Kentucky (head- 
waters region of Cumberland and Kentucky Rivers). 
37. LASMIGONA (LASMIGONA) COSTATA (Rafinesque), 1820. 
Alasnudonta costata Rafinesque, ’20.—Margaritana rugosa Lewis, 
*71.—Alasmodonta rugosa Pilsbry & Rhoads, ’98—Symphynota 
costata Ortmann, ’12b, p. 283 (anatomy ).—Symphynota costata 
Ortmann, ’130, p. 311.—Symphynota costata Goodrich, ’13, p. 94. 
—Symphynota (Lasmigona) costata Simpson, ’14, p. 488. 
A common species, most abundant in small and medium-sized 
streams, rarer in the larger rivers, but not absent there (Tennessee, 
lower Clinch and Holston). Goes up, in the Powell, to Olinger, Lee 
Co., Va.; in the Clinch, to Cedar Bluff, Tazewell Co., Va.; it is in 
Emory River; goes, in North Fork Holston, to Saltville, Smyth Co., 
Va.; in Middle Fork Holston, to Chilhowie, Smyth Co., Va.; in 
South Fork Holston, to Barron, Washington Co., Va.; in Watauga, 
to Johnson City, Washington Co., Tenn. It is also in South Chicka- 
mauga Creek, Ringgold, Catoosa Co., Ga. 
Type locality: Kentucky River. 
Genus: ANoponTA Lamarck (1799). 
Ortmann, ’12), p. 286. 
38. ANODONTA GRANDIS GIGANTEA (Lea), 1834. 
Anodonta gigantea Lea, ’34.—Anodonta grandis (incl. gigantea) 
Ortmann, 12), p. 292 (anatomy).—Anodonta grandis gigantea 
Simpson, ’14, p. 420. 
No Anodonta has ever been reported from the upper Tennessee 
