MARINE ALGjE OP VANCOUVER ISLAND 
103 
M. leptobermum Kjellman. Setchell & Gardner, 1903, p 209; 
Godins, 1909, p. 213; P.B.-A., No. 1272. M. zostericolum 
Tilden, Centuries, No, 388. On Zostera , Port Renfrew, Butler 
& Polley. 
Ulva lactuca var. latissima (L.) DC. Setchell & Gardner, 
1903, p. 210; Collins, 1909, p. 215;. P. B.-A., No. LXXVI. 
Esquimalt, Harvey; Departure bay, Macoun; probably gen- 
erally distributed. The mature plant seems to be always more 
or less regularly perforate; there are many snails that feed on 
algae, and make the fronds more or less ragged, but in the 
material from the northwest coast the perforations are more 
regular than are found elsewhere; observations on the living 
plant are needed. 
Yar. rigida (Ag.) Le Jolis. Setchell & Gardner, 1903, p. 209, 
Collins, 1909, p, 215; P. B.-A,, No. 407. Port Renfrew, Butler 
& Polley; Esquimalt, Harvey; Victoria, Macoun. Probably 
generally distributed, occurring in more exposed stations than 
var. latissima. The common Ulva of the California coast is 
generally known as U. fasdata Delile, and no sharp line can be 
drawn between the two species. 
Endoderma viribis (Reinke) Lagerheim. Collins, 1909, p. 
279; P. B.-A., No. 1626. In Apoglossum decipens, Macoun. 
Rhizoclonitjm e:erneri Stockmayer. Collins, 1909, p. 329; 
P. B.-A., No. 623. Victoria, Macoun. 
R. riparitjm (Roth) Harvey. A common species appearing 
under two forms : — 
Var. poLYRHizuM (Lyngb.) Rosenvinge. Collins, 1909, p. 328; 
P. B.-A., No. 24. Esquirpalt, Macoun. 
Var. implexum (Dillw.) Rosenvinge. Setchell & Gardner, 
1903, p. 222; Collins, 1909, p.328; P.B.-A., Nos. 266, 976; 
Tilden, Centuries, No. 379. Departure bay, Colquits, Macoun; 
Pedder inlet, Tilden. 
Cladophora glaucescens (Griff.) Harvey. Setchell & Gard- 
ner, 1903, p.224; Collins, 1909, p.336; Harvey, 1858, p. 77? 
P. B.-A., No. 817. Nanaimo, Harvey. This species rests en- 
tirely on Harvey’s determination of the Lyall specimens. It is 
by no means unlikely that it is not identical with the Atlantic 
species bearing the same name. 
24853—71 
