April. 1919.] THE GEmiTNATTON AND DFVELOPMElsT. 93 



EXPLANATrON OF PLATE I. 



Fig. 1. Carpospores liberated from the frond and precipitated on the bottom of 



beaker. Elliptical carpospores such as shown by are sometimes met with 



X 600. 

 Fig. 2. Carpospores beginning to germinate. X 600. 



Fig. 3. Carpospores germinated and produced a long tube from cacli. The arach- 

 noidal chromoplasts, elongated and entered into the tubes: X 600. 

 Fig. 4. Unusniil examples of germinating carpospores, the contents of which have 



all translocated into the tubes. X 600. 

 Fig. 5. Tlie tul)e elongated, and sejitated near the initial sporangial part. X 600. 

 Fig. 0. A protonema-like sporeling, with the beginning of a lateral branch from a 



cell. X GOO. 

 Fig. 7. A sporeling of more advanced stage of development than the preceding; a 



short, two-celled filament given forth from the initial sporangial part. 



X 600. 



Two well-developed sporelings with emptied gametangia. X 600. 



A M icrogametangium. X 1300. 



A Macrogametanginm and free macrogametes. X 1300. 



An emptied gametangium. X 1300. 



Stages of development of spores in alphabetical order, observed on the 



samples taken from the experiment ^block in autumn. Drawn at fixed 



material. 



Basal parts of the autumn-sporelings to show the. atrophying early-formed 



rhizoidal cells. Drawn at fixed material. X 480. 



Two sporelings of post-embryonal stage. X 340. 



