233 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. 1812-15. 
Dispositio Algarum Sueciae. 1812. 
Synopsis Algarum Scandinaviae. 1817. 
Systema Algarum. 1824. 
Icones Algarum Europaearum. 1828-35. 
Anderson, O. F. Om Palmella uvaeformis Kg. och hvilsporerna hos 
Draparnaldia glomerata Ag. Bot. Notis. 1888: 86, 87. 1888. 
Areschoug, J. E. Observationes Phycologicae. Act. Reg. Soc. Sci. 
Upsal. III. 6': No. 2. 1866; o: No. 1. 1874. 
