232 Ulothricaceae and Chaetophoraceae 



science, one variety is raised to specific rank, and five species are 

 definitely reported in America for the first time. Fourteen species 

 and varieties previously recorded have been considered doubtful, 

 either in respect to their occurrence in this country or their validity 

 in general. Numerous other varieties listed by Wolle, but without 

 record of actual occurrence here have been ignored. 



2. In the Chaetophoraceae twenty-nine species and two varie- 

 ties are recognized : of these, seven species and one variety are 

 described as new, and, in addition, four species and one variety are 

 reported from America for the first time. Fourteen species have 

 been placed on the list of little known or doubtful forms. 



3. While records of extended distribution have not been ob- 

 tained, certain regions, particularly the vicinity of New York city, 

 the palisade region of New Jersey, and, to a lesser degree, portions 

 of New England, regarding which previous records are very meager, 

 have been rather thoroughly explored. 



4. In several genera important additions have been made to the 

 knowledge of reproductive processes. 



5. A careful study of generic and specific foundations has been 

 made, and in this regard, these plants have been placed upon a 

 firmer and more satisfactory taxonomic basis. It is believed that 

 the discussion of so many forms as doubtful has in a measure 

 cleared the way for a more complete knowledge of these algae. 



6. Two genera, namely Stichococcus and Microthamnion, have 

 been placed in a position more in accordance with their true affin- 

 ities than they have held with recent authors. 



Bibliography 



Agardh, C. A. Algarum Decades, I-IV. 181 2-1 5. 



Dispositio Algarum Sueciae. 181 2. 



Synopsis Algarum Scandinaviae. 181 7. 



Systema Algarum. 1824. 



Icones Algarum Europaearum. 1828-35. 





Anderson, 0. F. Om Palmella uvaeformis Kg. och hvilsporerna hos 

 Drapamaldia glomerata Ag. Bot. Notis. 1888: 86,87. 1888. 



Areschoug, J. E. Observations Phycologicae. Act. Reg. Soc. Sci. 

 Upsal. III. 6 1 : No. 2. 1866; 9 1 : No. 1. 1874. 



