Fig. 15 



Protohyeniajanovii: A, reconstruction. Calamophyton: b, recon- 

 struction of C. primaevum; c, leaf, and d, sporangiophore of 

 C. bicephalum. Hyenia elegans: E, reconstruction; f, sporan- 

 giophore. Eviostachya Hoegi: G, sporangiophore; h, mode of 



