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shallow water ahout the edges of Watch Hill Pond, in southwest- 
ern Rhode Island. The pond is separated from the open Atlantic 
Ocean by only a narrow line of sand dunes, through and over 
which the autumnal and winter storms often dash the surf. Con- 
Sequently the water of the pond has a distinctly saltish taste. 
The Rivularia is associated with Anabaena variabilis, Phormidium 
Valderianum, Microcoleus chthonoplastes, Chara aspera, Chara crin- 
aa and various species of Closterium, Scenedesmus, etc. 
This species approaches &. iasolettiana in structure, but dif- 
fers from it decidedly in habit, and it was thought at first it might 
Perhaps be an epiphytic form of that species. But the globular 
shape of the thalli is exceedingly constant, and although carefully 
sought for, typical R. Aiasolettiana was not found anywhere in the 
Same vicinity. It seems best therefore to regard it as a distinct 
Species, and the writer takes great pleasure in dedicating it to Dr. 
Edouard Bornet, of Paris, who has done so much toward furthering 
our knowledge of this group of plants. 
R. Biasolettiana Menegh. occurs in fairly typical form in per- 
fectly fresh water at Gardner's Lake, in eastern Connecticut. It 
forms small flattened thalli on stones along the shores of the lake. 
Capsosira Brebissonit Kuetz., occurring in Sweden, France and 
Germany, grows also in this country upon a large rock on the 
eastern side of Round Pond at Lantern Hill, near Mystic, Conn- 
It forms small hemispherical black thalli from 1-2 mm. in diam. 
eter. They are crushed with some difficulty, but then show the 
Stigonema-like filaments with lateral heterocysts very plainly. It 
©ccurs sparingly also upon submerged dead wood. 
Nostochopsts lobatus Wood, found near Philadelphia by Wood 
and in Vermont by Faxon, has occurred to the writer in some 
abundance at Mt. Carmel, about seven miles north of New Haven. 
The thalli grew upon stones in more or less rapid water in a brook 
just west of the “ head’ of the mountain. 
Microchaete tenera Thuret, not hitherto credited to this coun- 
tty, grows in various localities in Connecticut. Specimens collected 
hear Norwich and examined by Dr. Bornet, have cylindrical 
Spores in a series, exactly corresponding to those described for 
M. diplosiphon Gomont. This species much mixed with various 
Selatinous algae occurs upon dripping rocks near Norwich and 
New Haven, Conn. 
