Pig ,o —Some Psilophvtineae. A, two species of Rhynia, showing the sporangia 

 at the ends of the branches (after Kidston & Lang) ( ■ i)\ B, Psilophyton pnnceps, 

 showing rhizomes below and, above, young branches uncurhng at l^eft and branches 

 bearing sporangia at right (after Dawson) ( • probably about Vo); C, Fsilotum 

 triquetnnn, showing the habit ( ; < h) and, enlarged, on left, part of a branch with 

 sporangia. A and B are reconstructed fossils, C is drawn from lite. 



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