PLATE III 
Fig. 1. Strophomena concordensis. A, B, C, D, E, F, pedicel valves; G, H, I, J, 
brachial valves; K, L, M, N, interiors of pedicel valves. Concord, Kentucky, 
from extreme top of Arnheim. 
Fig. 2. Strophomena nutans. A, interior view of pedicel valve; Oregonia, Ohio. 
C, brachial valve; D, profile section with brachial valve on left and pedicel valve on 
right; E, pedicel valve; copied from Ohio Paleontology, vol. 1, plate VI, Figs. 1 
A, F, B] types of the species, now lost; exact locality unknown. All of these speci- 
mens came from the Blanchester division of the Waynes ville. 
Fig. 2 B. Strophomena resembling Strophomena nutans. Pedicel valve, interior 
view. Richmond, Indiana, at the Rhynchotrema dentata horizon in the White- 
water member of the Richmond group. 
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