

%TTTT~TlTnf 



TTnTTTiii^ 



Fig. 4 



Zosterophyllum rhenanum: A, reconstruction; b, sporangial 

 region. Yarravia oblonga: c, sporangia. Cooksonia pertoni: 

 D, sporangia. Rhynia major: e, reconstruction; f, t.s. stem; 

 H, sporangium. Rhynia Gwynne-Vaughani : G, reconstruction. 

 Horneophyton Lignieri: i, reconstruction; J, k, sporangia 



(a, b after Krausel and Weyland; c, Lang and Cookson; d, 

 Lang; e, g, h, i, j, k, Kidson and Lang) 



