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On dead shells, Cape Rosier, Maine.

On roots of Spartina, Quamquisset Harbor, Falmouth, Mass.

Forming blackish tufts at the edge of the water, Quinnebaug River, Lisbon, Conn.

In a gelatinous mass on dripping rocks, Middlesex Fells, Mass.

In pools between tide marks, Cape Rosier, Maine.

On Elachista fucicola, Nahant, Mass.

On stones at outlet of fresh water brook, Magnolia, Mass.

In pool of standing water, among other algae, Malden, Mass.

On sandy bottom, in shallow water, Port Antonio, Jamaica.

In dense floating masses in a pool, Medford, Mass.

Spring form, mostly in shallow pools, epiphytic and on sticks, stones, etc., Bridgeport, Conn.

Attached to pebbles and later floating in Fresh Pond (brackish), Stratford, Conn.

In rock pools near low water mark, Newport, R.I.

On Rhodymenia palmata in warm, shallow tide pool, Spectacle Island, Penobscot Bay, Maine.

On stones in rapidly flowing water, Wood's Hole, Mass.

On rocks between tides, Duxbury Reef, Marin Co., Cal.

On Codium mucronatum, La Jolla, Cal.

On boulders, etc., at low water mark, under Pelvetia fastigiata, la Jolla, Cal.

Epiphytic and attached to various substances; summer and autumn. Bridgeport, Conn.

Claypit, Glenwood, Medford, Mass.

Berkshire Mill Pond (brackish), Bridgeport, Conn.

In large jelly-like masses on stalks of Ruppia in Fresh Pond (brackish), Stratford, Conn.

On sandy bottom and floating, fresh water ditch, Bridgeport, Conn.

In free swimming gelatinous masses of a yellowish or bluish green color, globular when young, later becoming irregular in shape. Norwich Conn.

On boards in a greenhouse New Brunnswick, N.J.

On grasses in pools in abandoned brickyard, Baltimore, Maryland.

On wet rocks, Ripton Gorge, Vermont.

On the ground in a cultivated field, Arlington, Mass.

Forming a coating on stones and algae in ditch in salt marsh, near Linden station, Revere, Mass.

On rocks and iron work, Stratford Shoals Light, Long Island Sound, near Bridgeport, Conn.

In cryptostomata of Sargassum, Wood's Hole, Mass.

On rocks and stones at low water mark, San Pedro, Cal.

On rocks and cliffs at low water mark, La Jolla, Cal.

On rocks in very rapid water at outlet of tidal basin, Goose Falls, Cape Rosier, Maine.

On bottom of a dried-up pool, Cambridge, Mass.

Pond in Middlesex Fells, Mass.

On Laminaria stipes, Swampscott, Mass.

On rocks about high water mark, Cape Rosier, Maine.

On damp marshy ground, Ithaca Flats, N.Y.

Small form, growing on Polysiphonia fastigata, Nahant, Mass.

Little Nahant, Mass.

On rocks between tides, Golden Gate, San Francisco, Cal.

On stones and on muddy bottom below low water mark, fruiting in summer and autumn, Bridgeport, Conn.

On pebbles at and below low water mark, Eastham, Mass.

In large clumps on rocks between tides, Fort Point, San Francisco, Cal.

On stones between tides, Fort Point, San Francisco, Cal.

Eel River Falls, Owen Co., Indiana.

On Alaria esculenta, Hardhead Island, Penobscot Bay, Maine.

Lying unattached on the bottom of Little Harbor, Wood's Hole, Mass.

In dead shells in company with Gomontia polyhiza, Mastigocoleus testarum, etc.; Spectacle Island, Penobscot Bay, Maine.