202 Phillips . — The Cystocarp in Rhodymeniales. 
Nitophyllum Hilliae , Grev. Figs. 26, 27, 28. 
Fig. 26. An axial cell with its pericentral cell. Surface view. Two carpogonial 
branches arise from the one pericentral cell. The sterile derivatives are not shown. 
Fig. 27. Vertical section of a stage later, when the auxiliary cell has been cutoff. 
The sterile filaments are a group of cells with the pointed apices directed towards 
the carpostome. The carpogonial branch may still be traced. Two others on the 
opposite side the axis are faintly traceable, x 180. 
Fig. 28. Enlarged view of the central region of Fig. 27. x 500. 
Fig. 29. Delesseria sinuosa , Lamx. Surface view of a procarp, to show its 
similarity to N. laceratum (Fig. 26). 
Fig. 30. Rhodomela subfusca. — Products of the pericentral cell at the stage 
of fertilization diagrammatically represented. 
Fig. 31. Similar diagram for D.alata , D. ruscifolia t D . Hypoglossum, D .sinuosa , 
N. laceratum , N. Hilliae. 
Fig. 32. Similar diagram for D. sanguinea, to which Dasya coccinea 
approximates. 
