FOSSIL COAL PLANTS. 27 



3. 0. undulatus, Sternberg, FIot. der Vorwelt, 1, 4,^. 16. 

 From the coal mines at Cuyahoga Falls. This was a 



large plant. I have compressed specimens eight inches in 

 diameter. 



4. C. Cistii, Brong., Hist. Veget. Foss., Tab. 20. 

 Conglomerate, Cuyahoga Falls. 



5. C. dubius, Artis, Ant. PJiyt., Tab. 13. 

 Zanesville. 



6. O. cannaeformis, Brong., Hist. Veget. Foss. Tab. 21. 

 G. psuedo bambusia., Artis. 



Conglomerate, Cuyahoga Falls. 



7. C. Voltzii, Brong. 



8. C. ? 



CALAMODENDEON — BKONG. 



9. C. approximatum, Brong., Tab. des Gen. p. 50. 

 Calamites ajpproximatus., Brong. 

 Calimates ornatus., Sternb. 



Conglomerate, Cuyahoga Falls. 



10. C. nodosum, Brong., Tab. des Gen.., p. 50. 

 Calamites nodosus^ Schloth. 



Conglomerate, Cuyahoga Falls. 



11. C. pachyderma, Brong. Tab. des Gen., p. 50. 

 Calamites 2^ cLG^^y derma .^ Brong." 



Conglomerate, near Akron. 



ARTISIA — STERNBERG. 



12. A. transversa, Sternb., Unger., Gen. et Spec, p. 253. 



13. A, approximata, Brong., Op. cit..,p. 276. 



These fossils are evidently the casts of the medullary 

 centers of plants, as shown by Dawes and Corda. No. 12 is 

 considered by Corda as the cast of the medullary cavity of 

 Diploxylon and 13 of Lepidophloios, (Lomatophloyos, Corda,) 



