Vol.1] Setchell-Gardner. — Algw of North wesfern America. 197 



Prince William Sound, Alaska, Saunders, No. 800! (1901, p. 399) ; 

 Glacier Bay, Alaska, Saunders (1901, p. 399). 



Stigonema minutum (A^anlh) Hassall. 



On dam]) rocks. Prince William Sound, Alaska, SaiDiders 

 (1901, p. 399). 



Family RIVULARIACE.4^. 



Calothrix consociata (Kuetzing) B. & F. 



On grasses, etc., in a salt marsh. Head of Penn's Cove, near 

 Coupeville, Whidbey Island, Wash., N.L.G., No. 'AHl 



From its diameter and coloration of sheath, the number 

 quoted above seems to belong here. The species seems to 

 partake of the characters of lioth C. confervicola (Roth) Agardh 

 and C. scopulorinii (\Vel)er et Mohr) Agardh, but with much 

 wider sheaths than either species has according to description. 



Calothrix scopulorum (Weber et Mohr) Agardh. 



In salt water. Puget Sound, Saunders (1901, p. 399). 



Calothrix pulvinata (Mertens) Agardh. 



On sticks and old wood, in salt marshes. Whidbey Island, 

 Wash., N.L.G., Nos. 303!, oGO!, and in Collins, Holden and 

 Setchell, P. B.-A, No. 957! 



Calothrix Crustacea Thuret. 



Floating, on rocks, clay l)anks, wood, etc., in brackish lagoon. 

 Whidbey Island, Wash., X.L.G., Nos. 302!, 421!, 583!; Key- 

 port, Kitsap County, Wash., X.L.G., No. 494! 



This is a very variable species, especially concerning the 

 matter of branching. While most of the filaments are simple 

 and typical, there are intermingled, particularly in No. 583, 

 filaments branched in such a way as to properly come under 

 C. prolifera Flahault, C. jascieuhita Agardh, and even C. vivip(tr(i 

 Harvey. No. 494 grew on a clay bank above liigh water mark, 

 and represents a very depauperate form of the species. 



Calothrix fusca (Kuetziug) B. & F. 



Occurring singly or few together in the jelly of other species 

 of algae. Near Iliuliuk, Unalaska, Alaska, ir.A.^V. and A.A.L., 



BOT.-U. 



