PLATE 54 

 (From ]Mycologia 1: P!. i6. 1909.) 

 Leptoi.egnia caudata 

 Fig. I. A branched sporangium with one opening at a. X 90. 

 Fig. 2. Oogonium with two antheridia. X 370. 

 Fig. 3. Antheridium applied to an oogonium. X 370. 



Fig. 4. Oogonium with antheridium pulled away leaving a distinct circular opening. X 370. 

 Fig. 5. a. Part of a sporangium, showing spores killed in the act of emerging; b, c, d, e, 

 f, g, It, i showing spores in successive stages of rounding up in preparation for 

 swimming off after emergence. 



