vol. i] Setchell-Gardner. — Algie of Northwestern America. 221 



Urospora incrassata Kjellman. 



On rocks in the literal zone. Whidbey Island, Wash., X.L.G., 

 No. 185! 



The material seems to Mr. Collins to be of this species. 



Urospora Wormskioldii (Mertens) Rosenvinge. 



On small stones on exposed coasts. Near Victoria, B. C. 

 Tilden , No. 381 ! ; west shore of Whidbey Island, Wash. , X.L. G. , 

 Nos. 671!. 234!. and in Collins, Holden and Setchell, P. B.-A. 

 No. 915!"; San Jnan Island, Wash., K.L.G,, No. 208! 



Mr. Collins expresses the opinion that Miss Tildeu's speci- 

 mens are too near the type to be separated under the varietal 

 name Ycmcouveriana as she has done, and that Gardner's San 

 •Juan Island specimeus represent a rather slender form. 



Chaetomorpha cannabina (Aresehoug) Kjellman. 



Lying loose or entangled among other alga?, in pools, literal 

 zone. Norton Sound, Alaska, R. C. McGregor, No. 5686! ; west 

 shore of Amakuak Island, Bay of Unalaska, Alaska, W.A.8. and 

 A.A.L., No. 3244! . and iu Collins, Holden and Setchell P. B.-A., 

 No. 916! : St. Paul. Kadiak Island. Alaska, 11 .A.S. and A.A.L., 

 No. 5141!; Seldovia, Cook Inlet. Alaska, Saunders: (1901, p. 

 413): Orca. Alaska. W.A.8. and A.A.L., No. 5169!; Annette 

 Island, Alaska. Saunders (1901, p. 413); Friday Harbor, San 

 •hum Island. Wash.. X.L.G., No. 219! 



Chaetomorpha duriuscula (Ruprecht) De Toni. 



Unalaska, Alaska, Ruprecht (1851, p. 404). 



De Toni (1889, p. 277) refers the Conferva duriuscula of 

 Ruprecht to the genus Chaetomorpha with more or less doubt. 

 We have not seen any plants attributed to this, but judging 

 from the description and the association, it is more likely to be 

 some fragmentary material of Cladophora, upon which the 

 species was founded. 



Chaetomorpha litorea Harvey. 



Sitka, Alaska, Ruprecht (1851, p. 399 under Gh. tortuosa 

 var. crassior) . 



Harvey (1857, p. 87) refers Ruprecht's variety crassior of 



