466 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
Brachial interior with moderately wide notothyrial cavity, moderately thick 
brachiophores and supporting plates ; cardinal process slender ; median ridge low, 
fairly slender. 
Measurements in mm.— 
Brachial Hinge 
Length length  Midwidth width Thickness 
Rlolotyper coscwecese tte 13.8 13.0 177 13.9 8.9 
Paratype’ (1r0635a). 9's: ae 14.5 13.7 18.3 12.0 9.8 
ag (@T0G635e) eR eee 15.9 14.8 19.8 12.3 10.4 
Types.—Holotype: 117034a; figured paratypes: 110628, 110635a,f, 110639¢,i; 
unfigured paratypes : 110635b-e,g-], 110639a-d,f-h; figured specimens: 118002a-c. 
Horizon and locality—Upper half of Lebanon formation in Tennessee: Be- 
side U. S. Highway 41, $ mile south of Knox Branch, 9 miles southeast of Mur- 
freesboro ; Columbia; 3 miles east of Murfreesboro; opposite Fairview Service 
Station on U. S. Highway 70N, 11.6 miles east of Lebanon city limit, 2.5 miles 
east of Wilson-Smith County line on U. S. Highway 70N; at east end bridge 
over Round Lick Creek, Rome; 20 feet above Cryptophragmus on south side 
U. S. Highway 70S, $ mile east of Readyville. 
Cane Creek formation (95 feet above base) in Virginia: North of Chattels 
Station Church, on old U. S. Highway 58, 2 miles west-southwest of Ewing, 
Ewing (T.V.A. 161-NW) Quadrangle. 
Carters formation in Alabama: At quarry 4 mile north of Gate City on Red 
Mountain; Clifton Terrace, Birmingham, Leeds (15’) Quadrangle. 
Discussion.—This species is characterized by its fine costellae, deep valves, 
broadly uniplicate anterior commissure, and moderately wide hinge. This species 
is readily separated from such other Tennessee species as D. crassus and D. ex- 
tensus by its finer costellae. It differs from both Oklahoma species in its larger 
size and more robust form. It is larger than D. pervetus and differently folded. 
It is more finely costellate than the other Upper Mississippi Valley species. Its 
closest relative is D. missouriensis from the Macy formation. It differs from that 
species in lesser width, a stronger brachial sulcus, wider pedicle sulcus, and 
broader plicate wave in the brachial valve. Doleroides tennesseensis is more 
finely costellate, somewhat wider, and with less prominent brachial sulcus than 
D. ottawanus Wilson. 
DOLEROIDES WINCHELLI Cooper, new name 
Plate 93, A, figures 1-7 
Orthis media N. H. WINcHELL (not Shaler, 1865), 8th Ann. Rep. Minnesota Geol. Nat. Hist. 
Surv., p. 64, 1880. 
Large for the genus, wider than long and subrectangular in outline; sides 
rounded ; anterior margin nearly straight; anterior commissure strongly unipli- 
cate ; costellae strong, those on the fold and sulcus slightly stronger than those 
of the flanks; about 8 costellae in 5 mm. in the median region and about 10 in 
5 mm. at the flanks, both counts taken at the anterior margin. 
Pedicle valve with unevenly convex lateral profile, the posterior half moder- 
