3 
in ramification, but the cells are not arranged in a netlike manner, 
resembling rather those of E. compressa, {rom which it is distin- 
guished by the uniform arrangement of the cells in longitudinal 
series, Thé ramuli often terminate in a single row of cells, which 
is, however, much shorter and less characteristic than in EZ. Hop- 
kirkii. It appears to be not uncommon. 
E. TorTA (Mert.) Reinbold. In this species the fronds are 
very slender, from two to eight cells in breadth, the cells always in 
longitudinal series and usually in cross rows; the branches are 
only one or two cells broad, resembling the filaments of 7etranema 
Percursum, but without the exactly symmetrical arrangement of 
cells in the latter. I found it at Eagle Island, Penobscot Bay, 
Maine, in July, 1894, growing in company with other Zxteromor- 
Phas, Cladophora expansa, Lyngbya aestuarii, etc., in a lagoon 
reached by only the highest tide, and the water of which often be- 
came by continued evaporation, salter than the ocean. 
At this same locality I found, in July 1893, a plant in regard 
to which I have been in some doubt, but I venture to describe it as 
E. CRUCIATA n. sp. 
Fronds branching, mostly of a single series of cells, but at the 
point of branching of two series or sometimes more; branches is- 
Suing at right angles or nearly so, usually opposite, but sometimes 
alternate or secund, simple, usually short, tapering ; monosiphonous 
filaments usually 20-30 yz. diam.; cells about as long as broad, cell 
wall very thick; in the irregular cellular masses where several 
a issue near together, the cells are rounded, up to50 yw 
iam. 
The general appearance of the fronds is somewhat like that of 
Rhizoclonium, and the shorter branches somewhat resemble those — 
of the latter genus; but the branches are much more numerous 
and longer; they are mostly opposite, but sometimes issue two or 
three on the same side of the main filiment. Younger parts 
bright green, older nearly colorless. Found unattached, among: as 
floating masses of Cladophora, Enteromorpha and Lyngbya in Wee GS 
shallow water of lagoon, Eagle Island, Maine, July, 1893. 
STREBLONEMA FASCICULATUM Thuret. S. volubilis Pp ringsh 
Beitriige zur Morphologie der Meeresalgen, p/. ///., B. Growin 
in the fronds of Castagnea virescens, Spectacle Island, Feno 
ly 
