CATALOGUE OF PLANTS. 609 
MICROCOLEUS, Desmaz. 
M. chthonoplastes (Fl. Dan.), Thur. 
Marine. Atlantic: On the marshes, Atlantic City—Morse. 
M, pulvinatus, Wolle. 
Fresh water. Ocean: In a mill-race, Bamber—Wolle. 
M. terrestris, Desmaz. 
Terrestrial. On moist earth; frequent. 
M. anguiformis, Harv. 
Terrestrial. Same habitat. 
M. hyalinus (Kiitz.), Kirch. 
Fresh water. In ponds, on Sphagnum. 
OSCILLARIA, Kutz. 
O. subuliformis, Harv. 7 
Marine. Atlantic: In brackish water and pools—Martindale. 
O. subtorulosa (Breb.), Farlow. 
Same habitat. 
O. brevis, Kiitz. 
Fresh water. In marshes; frequent. 
O. tenuis, Ag. 
In stagnant waters; frequent. 
O. gracillima, Kiitz, 
Fresh water. On small ponds. 
O. limosa, Ag. 
Terrestrial. On wet earth; frequent. 
O. natans, Kiitz. 
Fresh water. On ponds; frequent. 
O. nigra, Vauch. 
Fresh water. In wet places; frequent. 
O. Froelichii, Kiitz. 
Fresh water. On sluggish and stagnant waters; frequent. 
O. major, Vauch. 
Same habitat. 
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