NOTES ON CYANOPHYCE4E. 53 



eongestum. Wolle's specimens, being without special locality, were 

 probably collected in Pennsylvania. 



Microcoleus paludosus (Kuetz.) Gomont, not hitherto credited to 

 the United States, has been found in Rhode Island by W. J. Y. 

 Osterhout, in Southern California by Parish, and is at times more 

 or less common in the green-houses of the University of Cal^ornia 

 at Berkeley. 



Symploca muscorum (Ag.) Gomont is quite common in the Red- 

 wood region to the north of San Francisco Bay, where it has been 

 collected by Messrs. Howe, Davy, and the writer. It has been 

 distributed by Miss Tilden under No. 66 of the American Algse, 

 but with no definite locality given. 



Phorinidium innndatum Kuetz., attributed to this country on tlie 

 authority of a specimen collected by Farlow, has been distributed 

 by Wolle (No. 108) under the name of Oscillaria antUaria. 



Phormidium autumnale (Ag.), Gomont, undoubtedly common over 

 the whole country, has been distributed by Wolle as a variety of 

 Oscillaria violacea. It is not always an easy matter to distinguish this 

 species from Ph. uncinatum, but No. 295 of Miss Tilden's Ameri- 

 can Algse, seems to be Ph. autumnale rather than Ph. uncinatum. 



Osdllatoria sancta Kuetz., not credited to North America by 

 Gomont, has occurred in several parts of the United States consid- 

 erably distant one from the other. A. K. Harrison has found it at 

 the bottom of a warm spring at Lebanon Springs, New York, and 

 it has been f )und by the writer at the bottom of a cold stream near 

 Oakland, Ciiliforuia. It is rather too common, on earth, among 

 flower pots in the conservatories at the University of California at 

 Berkeley (cf. C. P. Nott, Phyc. Bor.-Araer., No. 500) and it has 

 been found under the same circumstances at St. Paul, Minnesota, 

 whence it has been distributed under the name of 0. limosa, by Miss 

 Tilden (cf. xlmerican Algce, No. 73). It is a very distinct species 

 and may be readily told by it^ peculiar attenuate and capitate, 

 calyptrate tip. Goraont's figure is most characteristic. 



Osdllatoria limosa Ag. is a common species. At least it seems to 

 occur wherever the coUectina; has been at all extensive. It is 



