210 ClIAETOPHORACEAE 



7: 189. pi. 3. 1775). We believe that any one would naturally 

 connect Miiller'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 stcllaris Midler, sixty years later be- 

 came the type of Kiitzing's genus Stigeoclonium. 



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; for a careful study of 

 Miiller'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 Rivularia 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. 1. 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. 



