
MARINE AQUARIA 

Coral; Agaricia agaricites, the Fungus Coral; and Millepora alcicornis, 
the Finger Coral or Sea Ginger. These corals cleared of the polyps may 
be obtained adhering to the rocks upon which they grew, or may be 
fastened with hydraulic cement in desired localities in the aquarium. 
VeRMES OR Worms AND LeeEcHeEs. ‘The marine forms occur in mud 
and sand, under stones and in rock crevices, crawling over the weeds and 
the bottom; or, either free or attached, in tubular cases, or sometimes 
attached to other animals. The Platyhelminths are principally flat worms, 
the Nemertinea thread-worms, the Nemathelminths round-worms, and 
the Polycheta many-bristled-worms; the Annulata ringed worms, and the 
Sedentaria tubicolous or pipe-worms. With but few of these we are con- 
cerned. Elsewhere the Trematoda, internal and external parasitic, and the 
Cestoda, strictly internal parasitic worms are mentioned. 
Nemertina. These long and slender marine worms are generally dis- 
tributed between tide-marks and are from ¥% inch to many feet in length 
and exceedingly contractile. Some will survive in confinement. The 
most generally species are: 
Nemertes socialis, color black or brown, slender slightly flattened, 5 
to 6 inches long when extended, with four eyes on each side of the head; 
and NV. viridis, color olive-green or brown, rather thick, slightly flattened, 
6 to 8 inches long when extended; eyes black in two rows. Both com- 
mon under stones, etc., in shallow water. 
Tetrastemma arenicola, color dark-pink or purple, slender, cylindrical, 
4 to 5 inches long when extended, head changeable in form, neck slightly 
constricted. Common in sand and mud at low water marks. 
Cosmocephala ochracea, color grey or yellowish-white and mottled, 2 
to 3 inches long when extended, rather stout and cylindrical. Common 
on low-water-marks, usually in empty shells. 
Polina glutinosa, color orange or light-yellow, eyes numerous 1n oblique 
lines on head, 2 to 3 inches long when extended, usually on alge and 
woodwork. 
This group of worms will not long survive in aquaria together with 
other animals. 
SEDENTARIA. These tubicolous marine worms make interesting aquarium 
studies as they construct tubes of grains of sand, seaweeds and particles of 
shell by mucus secretions; other secrete calcareous matter which forms 
hard cases. All have the anterior portion more developed than the pos- 
terior end of the body. The most general and interesting are: 
Amphitrite ornata, color red or brown, 8 to 12 inches long, with three 
pairs of plumelike gills and many flesh colored tentacles at the head, 
which are constantly in motion. The tubes are 14 to 3¢ inch in diameter, 
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