CATALOGUE OF PLANTS. 611 
MERISMOPEDIA, Meyen. 
M. convoluta, Breb. 
Fresh water. Frequent in ponds. 
COELOSPHASRIUM, Neg. 
Cc. Kutzingianum, Neg. 
Fresh water. On stagnant pools; frequent. 
CLATHROCYSTIS, Henfrey. 
GC. roseo-persicina, Cohn. 
Marine. Atlantic: On marshes and on mud and small peb- 
bles, Atlantic City—Morse. 
POLYCYSTIS, Kutz. 
P, pallida (Kiitz.), Farlow. 
Marine. Atlantic: On decaying algee—Morse. 
P. ichthyoblabe, Kitz. 
Fresh water. Occasional in small pools. 
ENTOPHYSALIS, Kutz. 
E. granulosa, Kiitz. 
Marine. Atlantic: On shells, Atlantic City—Morse. 
GOMPHOSHASRIA, Kutz. 
G. aponia, Kiitz. 
Fresh water. In ponds and pools; frequent. 
MICROCYSTIS, Kutz. 
M. protogenita (Bias.), Rab. 
Terrestrial. On wet timbers, trunks of trees, etc. 
