345 
King’s Survey, to that of Wheeler’s Survey, and to the Botany of 
California. 
In 1873 he began a series of notices of “ New or Little 
Known Ferns of the United States,” directly leading up to his 
great work on ‘‘ The Ferns of North Amcrica.” This classic and 
and well-known work consists of two royal octavo volumes con- 
taining 683 pages and illustrated by 81 colored plates, after draw- 
ings by Emerton and Faxon, representing 149 species, all that 
were known at the time from North America north of Mexico. 
They were issued in 1879 and 1880, but the notes on ferns in the 
BULLETIN of the Torrey Botanical Club were continued actively 
until 1883, after which there were very few articles from his pen on 
this subject. 
He was for many years much interested in Algz and spent a 
- considerable time upon them. He spent a portion of one summer 
with the United States Fish Commission at Noank, engaged in 
the study of this group. He published very little upon them, 
however, limiting himself to a list of Eastport Algz, another of 
those collected by Edward Palmer in Florida and the Bahama 
Islands, and directions for mounting and preserving specimens. 
He was associated with Professor W. G. Farlow and Dr. C. E. 
Anderson in issuing the Algae Americae-Borealis Exsiccatae. 
The later years of Professor Eaton’s life were devoted to the 
Study of the mosses and liverworts. His interest in these plants 
Was well advanced even in his undergraduate days. He collected 
much and carried on a considerable correspondence with W. S. 
Sullivant in regard to the determination of his specimens. His 
knowledge of the New Haven Moss and Hepatic Flora was very — 
extensive, and he contributed the account of these plants to the 
Catalogue of Plants growing within 30 miles of New Haven, pub- 
Published by the Berzelius Society of the Sheffield Scientific 
School in 1878. His other publications on these groups are con- 
fined to lists of Patagonian species and a few notes on new or rare 
Species of the United States. 
He spent a great deal of time in the study of the Hawaiian 
Species, both of Mosses and Hepatics, and had almost completed 
the determination of the species of the various collections in his 
Possession. He spoke to the writer only a few weeks before his 
