574 ORTMANN—NAYADES OF 
man, Roane Co., Tenn.; North Fork Holston River, at Saltville, 
Smyth Co. (O. A. Peterson), and at Holston, Washington Co., Va. 
(Walker coll.) ; Holston Bridge, Scott Co., Va. (Walker coll.) ; 
Holston River, Rogersville (—Austin Mill), Hawkins Co., Tenn. 
(Walker coll.) ; Little Pigeon River, Sevierville, Sevier Co., Tenn. ; 
Pistol Creek, Rockford, Blount Co., Tenn. In addition, it is in 
Lewis’s list from the Tennessee below Knoxville. 
Type locality: Rockcastle River, Ky. Its actual presence in Rock- 
castle River, at Livingston, Rockcastle Co., Ky., has recently been 
confirmed by Williamson (as U. glans, see: Ohio Naturalist, 5, 1905, 
p. 311). Wilson & Clark, ’14, do not give it from this place, but I 
have seen specimens in the Walker coll. from this locality. 
Note: This form is also present in the tributaries of the Ten- 
nessee in North Alabama, as has been indicated long ago by Conrad. 
It also seems to be represented in the Alabama drainage, but from 
this region it generally goes under the name of corvunculus Lea, ’68. 
I have a number of specimens of the latter before me, which I cannot 
distinguish from the upper Tennessee form. 
Genus: Lem1ox Rafinesque (1881). 
Frierson, ’t4a, p. 7—Ortmann, 16, p. 39. 
62. LeMiIox R1MoSus (Rafinesque), 1831. 
Unio rimosus Rafinesque,’31.—Unio celatus Lewis, ’71.—Micromya 
celata Goodrich, ’13, p. 94.—Micromya celata Simpson, ’14, p. 
34.—Lemiox rimosus Frierson, ’14a, p. 7—Lemnuox rimosus Ort- 
mann, ’16, p. 39 (anatomy). 
This species has been reported from the Tennessee below Knox- 
ville (Lewis), and from Powell, Clinch, and Holston rivers (Call). 
It seems to have a wide distribution, but it is found nowhere in 
great numbers, and is thus a rdre shell. In the Powell, it goes up to 
Jonesville, Lee Co., Va.; in the Clinch, to St. Paul, Wise Co., Va.; 
in the North Fork Holston, to Holston, Washington Co., Va. It is 
found here and there in the Holston proper and the lower Clinch, 
but I have never seen it in the eastern tributaries of the Holston- 
Tennessee system. 
