126 
(Ed. echinospermum, A. Br., var. spermogonio-multicellulare, 
n. var. — Gynandrosporous, oospores globose, echinulate, spines very 
slender, dense and long. Androsporangia 2-5-celled ; dwarf males 
with spermogonia 8-io-celled. Fils. 25/^-30/* ; oogon. 50/^ ; stipes 
of males i8/f ; spermog. cells 15//. 
I collected finely developed specimens of this new variety in 
lakes at Winter Park, Florida, March, 1885. 
Q5d. cataractum, n. sp. — Idioandrosporous ; oogonia often 
terminal, single or twin, obovate or subglobose, or broadly oval, pore 
in upper part ; oospore globose or egg-shaped globose, nearly filling 
the oogonium; androsporangia 2-6 celled ; dwarf males somewhat 
curved, seated on or sometimes below the supporting cell ; spermo- 
gonia one-celled. Veg. cells 28/^-38/-/ long, 1.5-3^" diameter. Oogon. 
5S-6o/i long, by 60-75//. Oosp. 50-55/^ long, by 50-60//. Cell 
andro. 26-30/1 long, by 10-15^/. Stip. dw. males lo/i long, by 65//. 
Rapid stream below High Falls, Dingman's Ferry, July, 1885. 
(Ed. puiictato-striatum, D. By. — A good European species, for the 
first time here in^lakes near Winter Park, Florida, March, 1885. 
Cladophora, Ktz. C. cegagropila, Linn., var. thermalis, n. var. 
—Clusters attached, 1.5-2"™- in diameter, dark green ; filaments 
rigid, rnuch branched, more or less radiating from a common centre; 
branching lateral, erect patent, often enlarged towards the ends ; 
articulations long, 10-20 diameters. 
In manner of growth it has the appearance of C. glomerata, var. 
pumila, Bail., but the branching is lateral immediately below the 
apex, and not terminal as in that species. It has much in common 
also with sterile Pithophora. Comparing with European specimens 
of cegagropila, this is a fair representation, but it may be well to con- 
tinue observations on fresh specimens in different seasons of the year 
for complete identification. The plant was found attached to the 
planked sides of the outlet of the large sulphur springs at Green 
Cove Spring, Florida, also attached to sticks of old wood in coves 
of bark at Silver Spring, Florida. The waters of both places are warm 
and sulphurous. 
DictyosphcEreum, Naeg. D. Hitchcockii, n. jr/.— Cells green, 
broadly oval, length about one and one-half time the diameter; others 
indicating division by transverse constriction in the middle ; clus.- 
tered in radiating branched series, held by slender, colorless, gelati- 
nous threads; each cell having chlorophyll radiately gathered around a 
large central granule. The cells measure 12-13// wide, 18-20// long. 
Frequent in Split Rock Pond, N. T. 
Zygnema (Ag.) Ktz. Z. purpurea, n. x^— Primarily yellowish 
green, but soon changing to a dark purple, articulation one diameter 
to more rarely two diameters ; fruiting filaments more or less genicu- 
late; zygospores spherical, cells not (or but slightly) swollen. Diameter 
of filaments 20/i to (rarely) 25//. 
This plant is common in ponds and lakes of New Jersey, floating 
in large masses often yards in extent, filaments often geniculately 
united, but never in perfect fruit. I was fortunate in finding the 
same plant last March in the Tocoi marshes near St. Augustine, 
Florida. Wide ditches alongside the railroad were literally covered 
