PLATE LV. 
Page. 
Fig. 1. MacrorznioPTERis NERVOSA Font .-.... Seria acer penneausetee aa 88 350 
Figs. 2-5. ANGIOPTERIDIUM CALIFORNICUM Font......--.--.------------+---- 351 
Fig. 3. Enlargement of portion of Fig. 2 (three times). 
Fig. 5. Enlargement of portion of Fig. 4. 
500 ; 
