124 PALEOZOIC PALEONTOLOGY. 
DESCRIPTION OF SPECIES IN THE BEEKMANTOWN FAUNA. 
MOLLUSCOIDEA. e 
BRACHIOPODA. 
DALMANELLA WEMPLEI Cleland. 
Plate IV., Figs. 10-12. 
1900. Dalmanella (Orthis) wemplei Cleland, Bull. Am. Pal., No. 
135). 7, plo 1%, fess lO 15: 
Description.—Shell small, subquadrangular or subelliptical in out- 
line, a little wider than long, hinge-line a trifle shorter than the 
greatest width, cardinal extremities angular or a little rounded. 
Pedicle valve strongly convex, the highest point being posterior to 
the middle; beak elevated, projecting beyond the hinge-line; cardi- 
nal area high, slightly arched. Brachial valve less convex than the 
pedicle, with a mesial flattening, which sometimes becomes a shallow 
sinus towards the front. Surface of each valve marked by from ten 
to sixteen stronger, radiating coste, with finer ones between. 
The dimensions of the largest specimen observed, a brachial valve, 
are: length, 6 mm.; width, 8.5 mm. A smaller pedicle valve meas- 
ures: length, 5 mm.; width, 5.5 mm. 
Remarks.—There seems to be no doubt as to the identity of this 
little shell with D. wemplet, described from the Beekmantown beds, 
near Fort Hunter, New York. *It is represented by numerous speci- 
mens in the collection, which exhibit considerable variation in outline 
and surface markings. The proportional length and breadth vary 
from being nearly equal in some specimens to others in which the 
breadth is one and two-thirds the length. In all specimens, however, 
the breadth is the greater dimension. In most of the specimens the 
presence of stronger, radiating coste, with less conspicuous ones 
between, can usually be easily recognized, but in some specimens, 
which apparently belong to the same species, this alternation is not 
conspicuous. The species is most closely allied to D. macledi Whitf., 
from the Beekmantown limestone at Beekmantown, New York, and 
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