459 
species there is no perceptible thickening, and the frond is only 
about 8-9 thick, as:against 18 pein £. micrococca. In consequence 
of this Z. minima is softer and more flaccid than the other species. 
Found at half-tide mark, on the shore of Spectacle Island, Penob- 
scot Bay, Maine, July, 1896. 
Ecrocarpus ovatus Kjellman, Om Spetsbergens Thallophyter, 
rates, Be polycarpus Kjellm. Skandinaviens Ectocarpeer 
och Tilopterideer, 93. pl. r.f. a 
‘ A delicate species, characterized by the ovate plurilocular 
sporangia 28-52 ulong, 18-28 p broad, sessile on the branches and 
Opposite to each other or to a branch. Found at Edgartown, 
Mass., by Miss Colt, Feb., 1892.  * 
Sorocarpus UVAEFORMIS Pringsheim, Beitrige zur Morphologie 
der Meeresalgen, 12. i. 3. f. I-8. 
Habit of Ectocarpus, differing in having the plurilocular spo- 
Tangia in dense masses, usually at the bases of the branches, 
Found at Martha’s Vineyard, Mass., by Miss Colt, in 1892. 
PHYCOCELIS MACULANS N. sp. 
Basal layer of radiating densely packed dichotomous some- 
what irregular filaments, cells 12-14  diam.; vertical filaments 
simple, 14-16 yp diam., terminating in a colorless hair; plurilocular 
Sporangia ovate-lanceolate, 50-60 x 18-25 yp, either terminal on 
few-celled filaments rising from the basal layer, or more commonly 
lateral on the longer erect filaments, and either sessile or on a one~ 
Several-celled pedicel. 
In early stages the basal: filaments are quite irregular in’ shape 
and branching, but when fully developed, form a regular circular 
disk, which, however, separates easily into fan-shaped segments. 
The erect filaments ate long, straight, not tapering, with cells in 
the lower part one or two diameters in length; at the place of 
gtowth, in the upper part of the filament, the cells are quite short, 
and above this point they are much longer, and nearly or quite 
Colorless.. Short filaments bearing plurilocular sporangia may 
arise from: any part of the basal layer; but more commonly 
SPorangia are borne on the long erect filaments, and are either 
Sessile or shortly pedicelled. One or several may be borne ona 
