211 



Disc. 



Discina newberryi. Hall. See Appendix. 



Discina nitida. ( Orhicula nitida. Phillips, Geol. of York- 



Xlll ^.^J^^L^^'^'^im^ shire, Vol. 2, plate 11, fig. 10 to 13. — Meek 



and Worthen, Illinois Reports, Vol. 5, 

 plate 25, fig. 1). Collett's Indiana Rt. of 

 1883, page 121, plate 25, fig. 10, natural 

 size^ a hand specimen showing several 

 separate upper and lower valves. This 

 little shell is abundant in the Kittanning 

 coal shales at Cannelton, Pa., and through- 

 out the western States to Iowa. — XIII, 



Discina pleuritis. See Appendix, 



Discina seneca. (Hall, 1863, 16th An. Rt., Pal. N. Y., 



Viifis. 23 jA ^^^' 4^ P- ^^? plate 2, figs. 23, 24. Hamilton). 

 Olaypole's Perry Co. lists. Preface to r2, p. 

 xiii. Marcellus formation. Specimen 5-192, 

 from Barnett's mills. Perry Co. and 223-4, 

 H. IV, Pi, 2, twenty-four specs, from Center mills, Madison 



township. — This may be White's Discina near the top of the 

 MarceUus^ in G7, p. 76, 230, Montour region.— FZ/7 5. 



Discinse in Centre Co., in Oriskanyf, Ewing. (T4, p. 431.) — 

 Also in Marcellus (T4, p. 432.) 



Discinae in Mercer Co., in Berca grit? I. C. White (QQQ, 

 158.) — Also in Bedford shales (p. 196.) — In Crawford Co., in 

 Meadville upper limestone., in many places they abound ; mostly 

 undescribed species of Kinderhook (sub-carboniferous) aspect; 

 as on Grass run at Meadville, and at Glendale (Q4, 83, 126, 

 140). — In the Orangeville shale near Meadville; at Smith's 

 ravine; at Biier's (over the Corry SS.), Richmond township; 

 at Pfeiffer's, Woodcock ; at one mile W. of Venango village ; and 

 below Hayfield, they abound. At the last locality Discince and 

 Lingulm together fill 88' of* Orangeville shale from top to bot- 

 tom, with no other fossils present. (Q4, 170, 172, 195, 199, 202, 

 220.)— X 



Discina ? large; in Erie Co., Pa., among the mass of 



shells in the Spirifer bed over the Third Oil sandstone of the 

 Carroll quarry, Le Bceuff. (Q4, p. 240.)— YIII^IX. 



Discinse occur in the sub-Olean conglomerate of Crawford 

 Co., mostly broken and indistinguishable. (Q4, p. 79.) — X. 



