EXPLANATION OF PLATES 



PLATE 34 



Dictyota Binghamiae J. Ag. 



Fig. 1. Habit sketch of a robust plant. X 0.5. 



Fig. 2. Cross-section of a frond showing the character of the cells at the 

 margin. X 125. 



Dictyota flabellata (Collins) S. and G. 



Fig. 3. Habit sketch of a part of a frond. X 0.5. 



Neurocarpus zonarioides (Farlow) Howe 



Fig. 4. Cross-section of a frond showing the position of the fruit, the alae 

 (shortened) and the thickened central portion. X 45. 



Zonaria Farlowii S. and G. 



' Fig. 5. Habit sketch of a terminal fragment of a frond showing the method 

 of development. X 1. 



[740] 



