380 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1918. 



and opinions differ regarding its affinities, some students considering 

 that it represents a peculiar early Lepidophyte. Unquestionably a 



Fig. 28. — Protolepidodendron primaevum (Rogers) of the Portage beds of New York. 



good many unrecognizable fragments have been erroneously called 

 Psilophyton. 



