attached to sticks of old wood in coves of bark at Silver 
Spring, Florida. The waters of both places are warm and 
sulphurous. 72 
Dictyosphaereum Hitchcockii, n. sp. —Cellsgreen, 
broadly oval, length about one and one-half time the dia- 
meter; others indicating division by transverse constrietion 
in the middle; clustered in radiating branched series, held 
by slender, colorless, gelatinous threads; each cell having 
chlorophyll radiately gathered around a large central granule. 
The cells measure 12—13 u wide, 18—20 u long. 
Frequent in Split Rock Pond, N. J. 
Zygnema purpurea, n. sp. — Primarily yellowish 
green, but soon changing to a dark purple, articulation one 
diameter to more rarely two diameters; fruiting filaments 
more or less geniculate; zygospores spherical, cells not 
(or but slightly) swollen. Diameter of filaments‘ 20 u to 
(rarely) 25 u. Br: 
This plant is common in ponds and lakes of New 
Jersey, floating in large masses often yards in extent, fila- 
ments often geniculately united, but never in perfect fruit, 
I was fortunat in finding the same plant last March in the 
Tocoi marshes near St. Augustine, Florida. Wide ditches 
alongside the railroad were literally covered with asmoothh, 
glistening, dark purple mantle. Here for the first time 
were discovered good fruiting speeimens which determined 
the hitherto doubtful generie position of the plant. The 
ehlorophyll is usually more or less centrally contracted in 
each cell. There is no evidence of twin nuclei, a fact which, 
with the color and the geniculate feature of the filaments, 
makes a distincet specific character. og 
Mesocarpus crassus, n. sp. — Vegetative 
robust, measuring, with slight variation, 50 « in dia 
5—10 times as long as wide; fruiting cells very nearl 
or perfectly straight; zygospores smooth, spherical, 65 
in diameter. 2 ei 
.. Floating in extended, pale yellow-green masses on 
eh near St. Augustine, Florida. In every way much 
arger than the largest of described species, and the artieu- 
lations proportionately longer. X £tTE 
' 8Sphaerozosma, pulchrum, Bail., var. constri 
tum, n. var. — Cells half as long as wide, with a decidec 
constrietion in each lobe between the axis and the apex 
Diameter, 70—75 u. ‚innen 
Lake near Kissimme, Fla, | tim On 
