1908] Collins,— Notes on Aigae. IX 157 
among the firm and closely packed filaments of the Ralfsia, the dis- 
appearance of the now useless basal, attaching filaments, and the 
irregular form of what remains, seem not unnatural. The host is 
found all along the New England coast from Bridgeport, Connecti- 
cut to Cutler, Maine, and whenever it has been examined for the 
endophyte, the latter has been found. 
PRINGSHEIMIA SCUTATA Reinke. When the writer was collecting 
at Eastham, Massachusetts, Aug. 16, 1908, at ‘The Salt Pond," really 
the head of a bay among salt marshes, the Zostera growing there 
abundantly was found to be the host for many of the smaller species 
of algae; most of these were familiar and require no comment, but it 
was of interest to note P. scutata, of which only a single record appears 
for this coast.! Here it was not uncommon, and a set for distribution 
in the Phycotheca was easily obtained. The plant forms minute, 
rounded, thin, pale green dots on the Zostera, barely perceptible to 
the naked eye, but easily distinguished by the hand lens. 
OCHLOCHAETE FEROX Huber, Ann. Sci. Nat., Series 7, Bot., Vol. 
XVI, p. 292, 1892. In looking over the material mentioned in the 
last paragraph, it was noticed that some spots were of a much deeper 
green color than the others, and microscopic examination showed 
quite a different structure. In Pringsheimia there is originally a thin 
disk of laterally united radiating filaments, later developing another 
layer in the middle part of the disk, the cells of this second layer rounded 
but with no outgrowths. In the other form the frond consists of a 
densely packed mass of cells, with no indication of radiating filaments; 
the cells are ovoid or flask-shaped, vertically elongate, and terminate 
each in a long colorless hair. ‘These characters identify it with О. 
ferox, not before recorded for America. ‘Though not quite as fre- 
quent as the Pringsheimia, enough was found for distribution in the 
Phycotheca Boreali-Americana, and both species will appear in Fas- 
cicle XXXI. 
SPHACELARIA FUSCA C. Ag., Sp. Alg., Vol. П, p. 34, 1828. This 
species, though dating from so long ago, was always a matter of doubt 
until Sauvageau,? brought forward the characters that distinguish it 
from the common S. cirrhosa (Roth) Ag. The latter species is abun- 
dant on the New England coast from Cape Cod south, and is occasion- 
ally found, usually in warm, sheltered bays, as far north as the Gulf 
1 Collins, Bull. Torrey Bot. Club, Vol. XVIII, p. 340, 1891. 
? Sauvageau, Jour. de Bot., Vol. XVI, p. 209, 1902. 
