1905] Collins, Phycological Notes of Isaac Holden 169 
For several years before 1890 Mr. Holden had collected marine 
algae, but his specimens were not numbered; some species, such 
as the delicate form of Rhodomela, Æ. Roche Harvey, found abun- 
dantly then at Seaside Park, have not been seen, or are very rare, 
recently; the changes incident to the rapid growth of a city are felt 
by seaweeds as well as in other directions; some of the stations here 
given are no longer available; at Cook's Point, for instance, the orig- 
inal stations of Stictyosiphon subsimplex Holden, and Aydrocoleum 
Ffoldenii Tilden, have been destroyed by the building of great facto- 
ries and the cutting of channels and ditches through the marshes; 
but marshes of similar character are abundant in the vicinity, and 
other stations will undoubtedly be found. 
Mr. Holden distributed specimens freely to his correspondents, 
and in most cases these specimens bore the numbers from his note 
book; changes in names have been made in the past few years in 
some cases, and in the present list the latest accepted form is used. 
In the main it agrees with the list in RHopora, Vol. II, p. 41, and 
where it differs, the name used in the latter is given as a synonym. 
Where the name on a numbered specimen is found to differ from the 
name under the same number in this list, the latter can be accepted 
as representing either a change required by later botanical develop- 
ments, or a more mature determination by Mr. Holden. Few col- 
lectors were as careful as he to secure specimens at once in perfect 
condition for study, and representing at their best the form and color 
of the living plant; he never could refrain from collecting and mount- 
ing fine specimens of such genera as Grinnellia, Dasya, Antithamnion, 
which probably occur nowhere in the world in greater perfection and 
luxuriance than in Long Island Sound; the long series of numbers 
under each of these will show what favorites they were; but at the 
same time the most insignificant and unattractive appearing plants 
were collected and studied, time after time, until their identity was 
ascertained, and usually a set secured for distribution. Practically 
all of Mr. Holden's spare time for the thirteen years covered by this 
list was given to this work; but the great business enterprise of which 
he had charge took even more of his time than most men give to 
business. The dates in the note book might almost serve as a calen- 
dar of the Sundays and legal holidays for the thirteen years, with an 
occasional Saturday afternoon added. Mr. Holden was delightful 
in social relations; but an invitation to anything of a social nature 
