THE NAUTILUS. 81 
point approximately ? of the distance along the mantle edge 
from the anterior end, where the edge is produced into a tri- 
angular process, directed somewhat anteriorly, and which is in 
the line with the anterior edge of the post-adductor muscle. 
Above, this process is spotted wtth a medium brown color, and 
its edge is produced into papillae which become finer towards 
the coarser ones of the branchial and anal regions. Below, the 
coloration appears confined to a strip widest near the vertex 
of the process described, and is succeeded posteriorly by the 
papillae previously mentioned. 
WASHINGTON AND JEFFERSON COLLEGE, WASHINGTON, Pa. 
THE ANATOMY OF CERTAIN MUSSELS FROM THE UPPER TENNESSEE, 
RY A. E. ORTMANN, PH. D. 
In the Proc. Americ. Philos. Soc. 57, 1918, pp. 521-526, the 
present writer has published a Synopsis of the Naiades, or fresh- 
water mussels of the upper Tennessee drainage, assigning each 
species its proper place in the system. But in some of them 
the observations on the anatomy forming the basis for the tax- 
onomic arrangement have not been given. It is the purpose of 
the present paper to furnish these data, together with additional 
remarks on species treated previously. 
I am sorry that I am compelled to introduce again nomen- 
clatorial changes without fully supporting them; but this will 
be done in another paper. 
FUscoNAIA PILARIS (LEA), F. PILARIS LESUEURIANA (LEA), F. 
PILARIS BURSA-PASTORIS (WRIGHT). (See Ortmann, l. c., 
pp. 527-529. ) 
Anatomy: F. bursa-pastoris (Wr.) in Nautiu. 27, 1918, p. 90 
(incomplete, no gravid females at hand). 
Gravid females have been found subsequently on the follow- 
ing dates: May 11, 13, 14, 713; May 20, 22, 23, ’14; July 7, 8, 
13, 713. They belong in part to the var. bursa-pastoris, in part 
to the var. leswewriana, but none have been found belonging to 
