MARINE ALG/E OP VANCOUVER ISLAND 
121 
are more slender than the type of Polysiphonia plumula in 
Herb. J. Ag., which is from southern California, but otherwise 
they are the same. 
P. bipinnata (Post. & Rupr.) Falkenberg, Setehell & Gard- 
ner, 1903, p. 328; Harvey, 1853, p. 48, as Polysiphonia Cali- 
fornia; P. R.-A., No. 144, as Polysiphonia bipinnata. De- 
parture bay, Comox, Victoria, Gordon Head, Macoun; Port 
Renfrew, Butler & Polley. Under this must be included the 
following species of the Lyall Collection: Polysiphonia Cali- 
fornia and var. plumigera , P. bipinnata and var. gemmifera. 
P. parasitica (Ends.) Falkenberg. Setehell & Gardner, 
1903, p. 328, as P. dendroidea; P. B.-A., No. 642, as P. para- 
sitica var. dendroidea. Esquimalt, Harvey, as Polysiphonia 
dendroidea; Victoria, Comox, Macoun. Represented here by 
two forms : — 
Forma Borealis n. f., more slender and less branched than 
the European type. 
Forma Luxurians n. f., broader, several times pinnate. 
The typical form is intermediate and has not been reported 
here. 
P. woodii (Harv.) Falkenberg. Setehell & Gardner, 1903, p. 
329; Harvey, 1853, p. 52, as Polysiphonia woodii; P. B.-A., 
No. 1545. Port Renfrew, Butler & Polley; Ucluelet, Macoun. 
The Ucluelet material includes male plants, not before recorded 
for this species; antheridia have been found in only a few species 
of Pterosiphonia } and in these do not differ from those of Poly- 
siphonia , the spermatangia being closely set all around an erect 
axis, the whole having a conical form. In P. woodii the sper- 
matangia are placed on the edge of a flat cellular disk, but not 
on the surface. The antheridia of Chondria are similar, but 
the disk is undulate and wavy, not fiat. It may be that this 
species should be removed from Pterosiphonia , but antheridial 
characters have been so little used in specific or generic dis- 
tinctions, that it may be well to make no change until more is 
known of their significance and permanence. 
Lophqsiphonia villum (J. Ag.) Setehell & Gardner, 1903, 
p. 329. (243) Departure bay, Macoun. Forming a short, 
dense, plushlike coating on rocks and algae. It is the Polys- 
ipkonia villum of Alg. Am. -Bor. Exsicc., No. 134 bis,, but not 
of P. B.-A., No. 246. 
