The JSTew Species of Brachiopoda, 357 



Spirifer Newberryi, Hall. 1883. 

 Plate 7, figs. 25, 26. 



Spirifer Neivberryi, Hall. 2nd Ann. Rept, State Geologist, pi. (xxxi) 56, figs. 



9. 10. 1883. 

 Spirifer Newberryi, Hall. Palaeontology of N. Y., vol. VHI, pt. 2, p. 362, pi. 



xxxi, figs. 9, 10. 1894. 



Shell moderately large, with sharp cardinal angles. Surface 

 plication consisting of numerous fine simple or duplicate ribs 

 which cover the median fold. On each lateral slope there are 

 twenty-tive to thirty of these plications. The plications and the 

 grooves between them are covered with tine radiating lines. 



Waverly group. Ohio. 



Cyrtia radians. 



Plate 7, figs. 28, 29. 



Cyrtia radians, Hall. Palaeontology of N. Y., vol. VIII, pt. 2, p. 362, pi. 

 xxviii, figs. 4, 5, 50, 52 ; pi. xxxix, fig. 33. 1894. 



The typical form is of medium size, with high area, incurved 

 umbo and general cyrtiniform aspect. Its outer surface is char- 

 acterized by an absence of plications and fine radial striae. 

 Median fold and sinus well developed. 



Clinton group. Rochester^ N. Y. 



An allied but larger form, here referred to this species, occurs 

 in the Niagara dolomites, near Milwaukee, Wisconsin. 



Cyrtina umbonata, Hall, var. Alpenensis. 



Plates, figs. 9-13. 



Cyrtina umbonata, Hall, var. Alpenensis, Hall. Palaeontology of N. Y., vol. 

 VIII, pt. 2, p. 362, pi. xxviii, figs. 16-20. 1894. 



Cyrtina umbonata^ Hall, from the original locality in Iowa, is a 

 small shell, often obscurely plicated ; this variety possesses the 

 contour of C. umbonata, but is a larger and more robust shell 

 with broad and well-defined plications, smooth median fold and 

 sinus. 



Hamilton group. Aljpena^ Michigan. 



