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MARINE AQUARIA 
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Enteromorpha compressa (Grev.) or Band Weed, has two layers of 
cellules in the compressed or flattened fronds, slender at the base but 
gradually expanding above, with a blunt, straight-cut top. This alga 
grows to 8 and ro inches in length and is of a dark-green color. It may 
be found along the entire Atlantic coast and is one of the few which may 
survive in the aquarium. 
Cladophora rupestris (Linn.) or Rock Branchweed, has dark, dull- 
green, stiff and rigid fronds with secondary acutely divided branches and 
closely clustered branchlets. The plant forms a tuft 3 to 6 inches high. 
May be found near low-water marks in tide pools or attached to the sides 
of rocks and wreckage. Most plentiful along the New England shore, 
but extends south to Florida. 
Cladophora arcta (Dillw.) or Arched Branchweed, has very thickly 
clustered branches and straight branchlets, giving the tuft a graceful arched 
appearance. The color is a glossy yellowish-green. It is frequently met 
with below tide-marks from Cape Cod south to Virginia and near Santa 
Cruz in California. 
Bryopis pulmosa (Lam.) or Sea Feather, has beautiful bright-green 
tufted 2 to 6 inches long branches, with spreading slender filamentous 
pinnate fronds, which are shorter at the ends of the branches and placed 
to give the plant a feathery appearance. May be found in tide-pools 
growing on the rocks and on wreckage, and is very widely distributed on 
the Atlantic and Pacific coasts. 
Chetomorpha melagonium (Web.) or Flowing Hair, has stiff wirey 4 to 
12 inches long, articulated, bristly fronds tapering at the base, with blunt 
tips, rising from a disclike holdfast. It 1s of clear dark-green color and 
common on northern rocky shores; very rarely in sandy localities. 
Chetomorpha tortuosa (Dillw.) or Sea Wool, forms green mats com- 
posed of very thin filaments on rocks and shells, a densely felted and 
interwoven mass of wooley, confervalike growth. Common from Delaware 
northward. 
Vaucheria marina (Dillw.) or Marine Vaucheria is a small brilliantly 
green tufted plant growing quite generally on the mud banks and rocks 
between tide-marks. Another form, /. submarina, occurs in deeper water. 
Oxrve-Cotorep Marine Atc#&. Melanospermee are mostly of 
strong growth and leathery consistency, and will not thrive in the aquarium. 
They are a very numerous family of which but a few species of the more 
widely distributed genera are here given. 
Alaria esculenta (Grev.) or Edible Bladderlock, belongs to the group 
of Alge popularly known as “Kelps,” and has a quillike midrib which 
constitutes the stem, winged at each side with ribless leaflets, often divided 
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