HRA BEE BS Bs 
CATALOGUE OF PLANTS. 
. asteptum, Nordst. 
In quiet waters. 
. fasciculatum (Ehrb.), Ralfs. 
In ponds; frequent. 
. antilopzsum (Breb.), Kiitz. 
Same habitat. 
. tetracentrotum, Wolle. 
Sussex: Ip a pond. 
ARTHRODESMUS, Ehrb. 
. convergens (Ehrb.), Ralfs. 
In ponds ; common. 
. fragile, Wolle. 
Atlantic: Hammonton Pond and elsewhere. 
. Rauii, Wolle. 
Gloucester: In a pond near Newfield—E. A. Rau. 
. Subulatus, Kiitz. 
In ponds; rather rare. 
. Incus (Ehrb.), Hass. 
Atlantic: Hammonton. 
. octocornis, Ehrb. 
Same locality. 
EUASTRUM, Ehbrb, 
. crassum (Breb.), Kiitz. 
. oblongum (Grev.), Ralfs. 
. pinnatum, Ralfs. 
. humerosum, Ralfs. 
. ansatum (Ehrb.), Ralfs. 
. Didelta (Turp.), Ralfs. 
. ampullaceum, Ralfs. 
. affine, Ralfs. 
All frequent in ponds. 
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