Fig. 1. Psilophyton spec. Surface view of a part of the 

 cuticle. The abortive stomata are shown on the right. 



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•»?» 



Fig. 3. Psilophyton 



spec. Surface view 



of another part of the 



cuticle, showing the 



darker central spot 



and the longitudinal 



ridge. 



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Fig. 2. Psilophyton spec. Some 



cells of the left of the cuticle of 



fig. 1, showing the groove be- 



tween the cells. 



250 X 



