The IN'ew Species of Brachiopoda. 



3Y1 



Oriskania navicella. 



Plate 14, figs. 1-3. 



Oriskania navicella, Hall. Palaeontology of N. Y., vol. VIII, pt. 2, p. 270, pi. 

 Ixxix, figs. 25-27. 1894. 



Shell of considerable dimensions, elongate-ovate, plano-convex. 

 Pedicle- valve much the deeper with a prominent median ridge. 

 Surface of both valves smooth. Interior with a broad, triangular 

 undivided hinge-plate, bearing an erect, lamellar unciform cardi- 

 nal process and stout crural lobes. In the pedicle- valve are well- 

 developed dental lamellae. 



Oriskany sandstone. Rondout and Hudson^ N. Y. 



Selenella gracilis. 



Selenella gracilis, Hall. Palaeontology of N. Y., vol. VIII, pt. 2, p. 271, figs. 

 184-186. 



Shells small, elongate-ovate, with attenuate, truncate beak. 

 Yalves convex, surface smooth. Interior with a simple centro- 

 nellid loop. 



Corniferous limestone. Cayuga, Ontario. 



Selenella gracilis. 



rig. 2. Outline profile of conjoined valves. 



Fig. 8. Preparation showing the form of the loop. 



Fig. 4. An oblique view, showing the upward curvature of the anterior plate. 



Cryptonella subelliptica. 



Plate 14, figs. 4-6. 



Cryptonella subelliptica, Hall. Palaeontology of N. Y., vol. VIII, pt. 2, expl. 

 pi. Ixxxi, figs. 41-43. 1894. 



Shell elongate oval, broadest near the center of the length ; 

 valves convex, smooth. Pedicle-valve with arched and truncated 

 beak. 



Waverly group. Sciotoville, Ohio. 



