562 THE AMERICAN MIDLAND NATURALIST 



Lower Carboniferous (Mississippian, in part) 



Lepidocarpon mirabile (Nathorst) Lepidocarpon riparium (Nathorst) 



Lepidocarpon Tvildianum Scott — (Calciferous Sandstone). 



REFERENCES 



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Brongniart, Adolphe. 1822 — Sur la classification et la distribution des vegetaux fos- 

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1914 — On the fossil flora of the Staffordshire coal fields, Part III. Trans. Roy. 



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Krick, H. V. 1932 — Structure of seedlike fructifications found in coal balls from 

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LESQUEREUX, Leo. 1870 — Report on the fossil plants of Illinois. Geological Survey of 

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1880 — The coal flora of Pennsylvania, etc. Second Geological Survey of Penn- 

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Macfarlane, J. M. 1883 — On Lepidophloios, a genus of Carboniferous plants. Trans. 

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Reed, Fredda, D. 1936 — Lepidocarpon sporangia from the Upper Carboniferous of 

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ScHOPF, J. M. 1938a — Two new lycopod seeds from Illinois Pennsylvanian. Trans. 

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1938b — Spores from the Herrin (No. 6) coal bed in Illinois. Illinois Geol. 



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1940 — Lepidocarpon, in Janssen, R. E., Some fossil plant types of Illinois. 



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• 1941 — Mazocarpon oedipternum sp. nov., and the identity and relationship of 



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Scott, D. H. 1900 — Note on the occurrence of a seed-like fructification in certain 

 Paleozoic lycopods. Proc. Roy. Soc. London 67:306-309. 



