The ^N'ew Species of Brachiopoda, 355 



Strophalosia cymbula. 



Plate 7, fig. 5. 

 Strophalosia cymhula, Hall. Palaeontology of N. Y., vol. VIII, pt. 1, expl. pi. 

 xvii a, figs. 3, 4, 8, 9. 1893. 



Shell of mediuin size, convexo concave, .hinge-line, cardinal 

 area, deltidium and chilidium well developed. Brachial valve 

 smooth, pedicle- valve spinose, with a distinct scar of attachment 

 confined to the apex. 



Keokuk group. Lebanon, Kentucky, 



Spirifer crispatus. 



Plate 7, figs. 12, 13. 



Spirifer crispatus, Hall. Palaeontology of N. Y., vol. VIII, pt. 2, p. 360, pi 

 xxxvi, figs. 9, 10. 1894. 



Shell small, with moderately high, incurved area, scarcely 

 extended on the hinge ; well-developed median fold and sinus^ 

 and three coarse plications on each lateral slope. The surface is 

 covered by conspicuous concentric lamellae. 



Niagara group. Maryland. 



Spirifer Canandaiguae. 



Plate 7, figs. 14-16. 



Spirifer CanandaigucE, Hall. Palaeontology of N. Y., vol. VIII, pt. 2, p. 360, 

 pi. xxxvii, figs. 23, 24, 26. 1894. 



Shells of rather small size, having somewhat the aspect of an 

 elongate and umbonate S. fimhriatus. Umbo of pedicle- valve 

 prominent, narrow and closely incurved at the apex. Hinge-line 

 quite short, cardinal area small, incurved. Median sinus deep, 

 produced on the anterior margin, its anterior width being nearly 

 equal to the length of the hinge. On each lateral slope are from 

 two to four low radial undulations or plications, all of which are 

 sharply defined at the umbones. Surface covered with very fine, 

 closely crowded concentric lines which are granulous and were 

 originally fimbriate. Length of typical specimen, 21. mm.; 

 greatest width, 22 mm.; length of hinge, 10 mm. 



Hamilton group. Centerfield and Canandaigua Lalce^ iT. Y. 



