Rbodora 
JOURNAL OF 
THE NEW ENGLAND BOTANICAL CLUB 
Vol. 25. March, 1923. No. 290. 
DUMONTIA FILIFORMIS ON THE NEW ENGLAND 
COAST. 
WILLIAM ALBERT SETCHELL. 
In the years 1920 and 1921, Mrs. Setchell and myself attempted 
to determine something of the algal flora in the vicinity of Newport, 
Rhode Island, as regards its seasonal periodicity. Collections were 
planned for each month of the year, but, for reasons of inclement 
weather coincident with times of extreme low tide intervals, they 
could not be carried out with the regularity desired. We selected a 
locality along the outer Beach Road, about half-way between Graves 
Point and Prices Neck (cf. U. S. C. € G. S., chart No. 353, issue of 
Mar., 1918). Two jutting points enclosing a small rocky and pebbly 
beach, at the very roadside, offer here an exceptionally good and 
convenient collecting place, directly exposed to the waters of the 
Atlantic Ocean. On the easterly rocky point, composed of a flakey, 
micaceous schist, the different belts of the littoral region were well 
represented and, being provided with numerous small, shallow tide- 
pools, afforded excellent habitats for many small species, especially 
during the spring and early summer months. Our collections covered 
the months from March to September, with the exception of August, 
when inclement weather at the times of favorable low tides interrupted 
the sequence. 
At this locality, the extreme maximum temperature of the ocean 
waters seldom, if ever, exceeds 20? C., although that of the shallow 
tide-pools may exceed 30? C. for short intervals of time. The summer 
