PODO. 



724 





plate JZ. 



eight specimens (Nos. 210-140) were collected from Trenton 

 limestone at Bellefonte, Centre Co. (000, page 188.) — IIc^ 

 III h, — Plumulites a genus of Trilohites^ Barrande. 

 Pnigeacanthus ( Oracanthus) pnigeus, Newberry & Wor- 



then, Geo. Sur. 111., Vol. 2, 

 1866, page 117, plate 12, fig. 

 3, a fragment of fish spine, 

 the body of which was orig- 

 inally cartilaginous, covered 

 with a thin bony ornamented 

 crust, ending in a solid bony 

 point. The inside substance 

 decaying, the shell has been crushed in, and the opposite sur- 

 faces brought together, making a flat plate of extreme thin- 

 ness, but leaving the bony tip unchanged. Resembles Oracan- 

 thus abbreviatus^ Newb. from the Ohio Devonian more than 

 any other; but differs in having distinctly star- shaped tuber- 

 cles, arranged partly in lines, instead of smooth tubercles scat- 

 tered over the surface. Keokuk limestone. XI. 

 Podozamites emmonsi, Fontaine (P. lanoeolatus^ Em- 



Tn^s ^^ . 2 ...^:^5:-^:^ m o n s. ) — 



Monogr. U. 

 S.GeoLSur. 

 Vol. 6, 1883, 

 page 77, 

 plate 33, fig. 

 2, with leaf- 

 lets rather 



narrower 

 than E m- 

 mons' nor- 

 mal form 

 (i n Amer. 

 Geol. plate 

 3, fig. 7), 

 page 110, 

 plate 53, fig. 

 2. A fine 



R)n/-ci/nc .U.S. Bui f. 6. ' ^PJS3 plant mis- 



taken by Emmons for the English Zamites lanceolatus. L. & 



