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Spring, on rocks at low water mark, not plenty, generally on the north side of the rock, at Jersey City, 
Hurlgate, Castle Garden, Fort Hamilton, and other places. When young it is very flaccid, of a shining 
green, the branches free and adhering well to paper; old plants are of dull color, rigid, wooly, matted, and 
entangled, 2 to 5 inches high. The transition from flaccid, shining green, to dull wooly matlocks, requires 
only a short period ; and indeed the whole period of existence is brief. Four beautiful, flaccid, shining 
green plants, were left on a rock at Castle Garden, intending to visit them frequently in order to watch 
their growth, and gather them at maturity ; on revisiting the rock after a lapse of only five days, the color 
had changed to dull green, and the entire plants were matted like tag-locks of wool. 
Our harbor is rich in Cladophora, and if I have not enumerated as many species as are described by Brit¬ 
ish Algologists, it is not for want of materials. The plants of this genus are very variable ; if language would 
enable us to critically distinguish more of the varieties, it would remain questionable how far the multiply¬ 
ing of species is ornamental to the science, or useful to the student in Algology. 
Genus, CONFERVA. Plin. 
Green, unbranched, composed of a single series of cells or articulations ; fructi¬ 
fication as far as known, zoospores formed from the endochrome in the articula¬ 
tions. 
No. 210. C. melagonium . Web. and Mohr. Elongate, scattered, straight, 
thick, erect, stiff and wiry, articulations twice as long as broad. 
In deep water, between Governor’s Island and the Narrows, articulations varying from 1 to 5 or 6 times 
longer than broad, and color from dark green to yellowish white, very tough, often thrown on the shore loose 
or entangled in other Algae, from 1 to 10 inches long. European authors make several species that are here 
comprised in one ; a little difference in color or in length of joints, is not deemed ample for distinct specifi¬ 
cation. 
Family XVI. ULVAOBJE. Har. 
Green or purple, expanded or cylindrical membranes of polygonal cells. 
Genus, ENTEROMORPHA. Link. 
Membranaceous, hollow and reticulated, green ; fructification as far as known, 
spores directly formed from the endochrome in the cells, and thence issuing through 
pores. 
No. 220. E. intestinalis . L. Elongated, simple, wholly or partially inflated, 
often floating, and then wholly inflated. 
Summer, on rocks, and parasitical on F. nodosus and vesiculosus, near high water mark, 1 inch to 15 
inches long. 
No. 221. E. compressa. L. Elongated, branched, sub-compressed, branches 
generally simple, attenuated at base, and gradually enlarged to very obtuse apices. 
Summer, at and below low-water mark—mostly parasitical—not frequent. 
No. 222. E. rcimulosa. Sm. Very much branched, and interwoven, twisted, 
covered with spine-like branchlets. 
Summer, on docks, rocks and Algae, beginning near high-water mark, where it forms a beautiful green 
zone or belt, that girts the entire harbor; as the heat increases with the season, the growth extends down to 
near low-water mark; extremely variable in form and size; 1 inch to 15 inches long. 
