92 | Rhodora [May 
the Canaries and from Massachusetts to Florida, and on the coast of 
California; but this appears to be the first record for South America; 
this distribution assumes the identity of E. Mitchellae Harv. and E. 
virescens Thuret which seems to be now fairly well assured. The 
history of this species is of some interest; published by Harvey in 
1852,' on a plant collected at Nantucket by Miss Mitchell, nothing 
more was known of it for a long time. Farlow? says “Only known 
from the description and plate in the Nereis." "The next mention is 
ten years later ? when specimens collected by Miss Laura Jernegan at 
Edgartown were referred to this species, and attention was called to 
its resemblance to E. virescens Thuret. The latter name was used, 
but as nomen nudum only, by Flahault * and by Holmes and Batters,5 
but the actual publication was in a paper by Sauvageau.9 In this 
paper Sauvageau describes the two forms of plurilocular sporangia 
found in this species, indicating relationships not before known in the 
brown algae. In a later paper ? Sauvageau considers the Edgartown 
plant to be probably the same species but thinks proof is needed of 
its identity with E. Mitchellae Harv. Bórgesen 8 has compared au- 
thentic material of both species, finding only such minor differences 
as are to be expected in a plant as widely distributed as this. Æ. 
Mitchellae, with meiosporangia, was distributed from Edgartown as 
No. 321 in Collins, Holden & Setchell, Phycotheca Boreali-Americana, 
and from Bermuda as No. 1921; with megasporangia from La Jolla, 
California, as No. 671; megasporangia have also been found at 
Bermuda. 
CHONDRUS CANALICULATUS (Ag.) Grev. With cystocarps; quite 
like the large, little dissected plants collected by Dr. Coker at the same 
locality. 
GIGARTINA CHAMISSOI (Ag.) J. Ag. 
1 W. H. Harvey, Nereis Boreali-Americana, part 1, p. 142, Pl. XII. G, 1852. 
2 W. G. Farlow, Marine algae of New England, p. 72, 1881. 
3 F. S. Collins, Notes on New England marine algae, V. Bull. Torrey Bot. Club, 
Vol. XVIII, p. 335, 1891. 
* C. Flahault, Herborisations algologiques au Croisic, Bull. Soc. Bot. de France, 
Vol. XXXV, p. 381, 1888. 
š E. M. Holmes & E. A. L. Batters, A revised list of the British didis. algae. An- 
nals of Botany, Vol. V, p. 79, 1892. 
* C. Sauvageau, Sur l'Ectocarpus virescens Thuret. Jour. de Bot., Vol. X, p. 98 
(p. 37 of reprint) 1896. 
7 O. Sauvageau, Note préliminaire sur les algues marines du golfe de Gascogne, 
Jour. de Bot., Vol. XI, p. 177 (p. 12 of reprint) 1907. 
* Bórgesen, The marine algae of the Danish West Indies, part 2, Phaeophyceae, 
p. 129, 1914. 
