294 TRANSACTIONS OF THE CANADIAN INSTITUTE. [VOL. V 



Fig. 66. — The base of the cotyledon from the preceding, more highly magnified, 

 showing the formation of abciss-periderm at y. x i6o. (From a photomicrograph). 



Fig. 67. — Lamina of an attached sporophyte, eight years old, showing the fertile 

 segment,/, s., and sterile segment, j. s. x 8. 



Fig. 68. — Longitudinal section of an attached young sporophyte ; /*, cotyledon ; 

 /' and P, developing leaves ; r, primary root ; x and_;/, endophytic fungus of the sporo- 

 phyte. X 20. (From a photomicrograph). 



Fig. 69. — Cells of the primary root, containing the fungus of the sporophyte. 

 X 420. 



Fig. 70. — Transverse section of a prothallus : ar, antheridial ridge ; e/^i, an embrj'o. 

 X 20. (From a photomicrograph). 



