2930 CHAETOPHORACEAE 
7: 189. M. 3. 1775). We believe that any one would naturally 
connect Müller's figures with one of our globose species of 
Chaetophora ; yet it is a curious fact that this plant, or at least one 
bearing the name Conferva stellaris Müller, sixty years later be- 
came the type of Kützing's 15 00۰ 
Now whether this species was really a Stigeoclonium or, what 
we understand by Chaetophora, is, of course, an important ques- 
tion. For if it was the former, then the name Chaetophora would 
have to supersede Myxonema and Stigeoclonium, while the species 
we now know as Chaetophora would have to be restored to Rivu- 
laria. 
There is every reason, however, to believe that such a confus- 
ing readjustment will never be necessary; fora careful study of 
Müller's paper, supported by a comparison of the treatment of his 
species by early authors, is sufficient to convince one that the 
Conferva stellaris filamentis, etc., is really to be identified with one 
of our species of Chaetophora. Indeed by the ingenious process 
of juggling with names used by some authors, Schrank’s type 
might be identified with C. pisiformis, but we do not regard the 
actual specific identification as sufficiently certain to warrant the 
displacement of Roth’s name. 
It should be noted that Roth's type of Rivularia was R. Cornu- 
Damae [= Chaetophora incrassata], and that the schizophyceous 
species which form the genus now called Rivu/aria were added 
later and have no real right to the name. If the modern tendency 
toward multiplication of genera should reach Chaetophora, there 
would be a necessity for reviving the name Rivularia for the forms 
now grouped under the name Chaetophora incrassata, so that an- 
other generic name ought to be given to the Schizophyceae now 
bearing the name Rivularia. 
Synopsis of Species 
Colonies of filaments subglobose or tuberculose, 
Branching lax and spreading, fasciculate at the summit. I. C. elegans. 
Branching erect, fasciculate at the summit. 2. C. pisiformis. 
Branching erect, not fasciculate at the summit, 3. C. attenuata. 
Colonies of filaments extended, irregularly lobed or laciniate. 4. C. incrassata. 
