EXPLANATION OF PLATE XLIX. 
Fie. 1. Dictyonema flabelliforme Eichw. Hydrosome. Nat. size. Show- 
ing the root-like extension of the proximate end of the hydrosome. 
Fic. 2. A larger example of the same variety. Both from Div. 3c, Navy 
Island, St. John Harbor. 
N. B.—These figures were traced by Mr. Gilbert van Ingen from a photo- 
graph. 
