Trans: Rov: Soc: EdinT 
Vol: LI 1. 
Kidston and Lang - Plait IV. 
KlDSTON AND Lang Photo: , _ T Zinco Collotype Co.. Edinburgh. 
Figs. 15, 16 - Khynia G wynne -Vaughani , K&L 
Figs. 17-22 Rhynia Major, K&L. 
Fig. 23. Asteroxylon Mackiei, K&L. 
