68 PROCEEDINGS OF THE AMERICAN ACADEMY 



Fig. 17. Trichogyne with antherozoiJ attached and with trichophore budding. 



X 385. 

 Fig. 18. Showing the same points, but farther advanced. X 385. 

 Fig. 19. Trichogyne with two antlierozoids attached and with the trichophore 



budding. X 385. 

 Fig. 20. Young cystocarp. X 500. 



Fig. 21. Extremity of an antheridial branch with antheridia. X 385. 

 Fig. 22. Portion of a cluster of antheridial branches, seen in longitudinal 



section. X 500. 



Figure 1 was drawn by Mr. William D. Denton from a living plant ; the rest 

 of the figures were drawn by the author, with the aid of the camera lucida. 



