PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 693 
cut at Pleasant Valley, 6 miles northeast of Poughkeepsie, Poughkeepsie (15’) 
Quadrangle. 
Discussion—This species is unlike any other described American form. It is 
larger and less globular in form than J. panderi and has more costae in the fold 
and sulcus. It is most like Camarella thomsoni (Davidson) from the Stinchar 
formation at Craighead, Girvan, Scotland. It differs from the Scottish species 
in its larger size, less convex brachial valve and less costate anterior margin. 
The Scottish species has 4 costae on the fold and a costa on each flank. 
Superfamily SprrIFERACEA Waagen, 1883 
Family CYCLOSPIRIDAE Schuchert, 1913 
Spiriferacea with the crura continuous with the bases of the close-set, nearly 
parallel primary lamellae; spiralia slightly introverted and with few volutions. 
No jugum. 
Genus CYCLOSPIRA Halil and Clarke, 1893 
Cyclospira Hatt and CiarKE, Pal. New York, vol. 8, pt. 2, p. 146, 1893. 
CYCLOSPIRA BISULCATA (Emmons) 
Plate 142, L, figures 54-59 
Figures of this species, which is the type of the genus and a large form, are 
introduced for comparison with species assigned to Cyclospira from the Appa- 
lachian Valley and elsewhere. 
Figured specimen.—88272a. 
Horizon and locality—Coburg formation (upper), in New York: In the 
quarry east of Black River below Copenhagen, Carthage (15’) Quadrangle. 
CYCLOSPIRA ? LONGA Cooper, new species 
Plate 142,I, figures 39-43 
Shell small, pentagonal in outline, longer than wide with the greatest width 
at about the middle. Beak acute; shell posterior to middle narrowing rapidly to 
the beak ; sides somewhat narrowly rounded; anterior margin narrow and gently 
rounded. Anterior part of anterolateral extremities marked by 2 costae; surface 
without other ornament than the costae and folds. 
Pedicle valve about twice as deep as the brachial valve, moderately convex and 
with the greatest convexity slightly posterior to the middle. Beak moderately 
incurved. Umbo narrowly swollen. Fold low, extending to a point slightly an- 
terior to the middle where it passes into 2 narrowly rounded costae bounding a 
narrow sulcus. Flanks gently concave and with steep slopes to the margins. 
Brachial valve evenly and gently convex in lateral profile, with greatest con- 
vexity at about the middle. Posterior half slightly swollen and marked by a 
shallow and narrow depression that marks the position of the median septum. 
Sulcus originating slightly anterior to the middle, widening rapidly to the margin 
where it occupies about half the valve width. Sulcus for its entire length occu- 
