PLATE 50 



Chlanidophora abyssicola S. and G. 



Fig. 1. Two specimens of mature plants. Natural size. 



i 



Fig. 2. Young aplanosporangium in the distromatic portion of the frond. ' 



The two small cells below represent cross-sections of hairs. | 



Fig. 3. Gross-section showing three mature aplanosporangia with numerous ■ 



aplanospores and two paraphyses. ; 



Fig. 4. Surface view of a portion of the growing margins of a frond show- 

 ing the method of cell division. i 



Fig. 5. Portions of four cross-sections showing the character of the cells in 



different parts of the frond. The upper is the younger, near the growing margin. i 



The others are successively older toward the base. j 



Fig. 6. Longitudinal section through the margins. ] 



Fig. 7. Longitudinal section in the older part of the frond showing the i 



origin and prostrate position of hairs. Figures 2-7. X 250. | 



. \ 



Phaeostrophion irregulare S. and G. ] 



Fig. 8. Cross-section of the frond with zoosporangia. X 250. ' 



[772] 



