OLIVE COLORED ALGsE. 115 



ramuli, that portion commonly nearest the end, into 

 spore masses, which, under the glass, look not unlike 

 minute ears of corn. 



ECTOCARPUS VIRIDIS, HARV. 



This may be a mere variety of the last. It grows 

 in the same situation, but is much less common. The 

 color is a more pronounced green, and the frond is 

 decidedly more feathery, loose, open, and expanding, 

 than in E. siliculosus. The propigula are the same, 

 only that they are formed in the base of the ultimate 

 ramuli and so have the unchanged portion extend- 

 ing beyond the spore mass. Our figure in Plate IV., 

 gives a very good representation of this beautiful 

 species. 



1 TOCARPUS TOMENTOSUS, LyNGB. 



This is a native of our northern waters. The 

 filaments are fine, twisted and matted together like 

 cords, or interwoven into a dense sponge-like 

 branching tuft. Articulations two or three times as 

 long as broad. Propagula, oblong, obtuse set on 

 the lower branches by a short stem. Color, from 

 yellov-'sh olive to dark brown. It grows on various 

 substances between tides. It may be looked for 

 throughout the season. 



