EAD 
2 Rhodora [JANUARY 
are thrown ashore on beaches after storms. That this is the normal 
source for material is recognized in all the text books. “Collecting 
on sandy or gravelly beaches is very simple. One finds there only the 
Florideae and larger brown sea-weeds that are washed ashore after a 
storm." ! “First, from the mass of material which the sea throws up 
upon the beaches and leaves behind it when the tide goes out.... By 
careful search among this material you will find all the deep water 
forms." ? “A storm is often more productive than a dredging expedi- 
tion." 3 “At the time of maturity, the algae of the deeper waters are 
more or less readily torn away from their attachments, rise to the sur- 
face or near it, and are drifted ashore. Consequently it is well to 
examine the masses of driftweed driven ashore, especially after storms, 
in search of these inhabitants of the deeper waters." * As might be 
inferred from the quotations given above, authors of manuals and 
floras have included algae picked up with those found actually at- 
tached; indeed, not to have done so would have left out a considerable 
part of the species, among them some of the most interesting. Occa- 
sionally attention has been called to some plant, from its recorded dis- 
tribution unlikely to occur in the region where it came ashore, and it 
has been noted only as a waif, but as a rule, the question of origin has 
not been raised. Recently more consideration has been given to 
possible long distance transportation; Sauvageau, preliminary to giv- 
ing a list of the algae of the Bay of Biscay,* says “ Le temps a toujours 
été trés calme durant mon séjour en Espagne, et les algues déposées 
sur le rivage n'étaient pas apportées de loin, comme cela arrive souvent 
aprés une tempéte." 
Reinke 5 enumerates three species which he considers as transported 
from their homes to the western Baltic, and not native there. Ros- 
envinge 7 gives a list of 48 species coming ashore on the west coast 
of Jutland, with indications as to their probable origin. Schiller’s 
1 Farlow, l. c., p. 21. 
! Hervey, Sea Mosses, p. 14, 1881. 
3 Murray, An introduction to the study of seaweeds, p. 27, 1895. 
4 Setchell, Directions for collecting and preserving marine algae. Erythea, Vol. 
VII, p. 24, 1899. 
5 Sauvageau, Note preliminaire sur les algues marines du golfe de Gascogne. Jour- 
nal de Botanique, Vol. XI, p. 3 (of reprint), 1897. 
* Reinke, Ueber Gaste der Ostseeflora. Berichte der deutschen Botanische Gesell- 
schaft, Vol. X, p. 2, 1892. 
7 Rosenvinge, Om fremmede Alger ilanddrevne paa Jyllands Vestkyst. Bot. 
Tidsskrift, Vol. XXVII, p. 83, 1905. 
