188 University of California Publications. [Botanv 



Symploca hydnoides var. genuina Gomont. 



Growing on log's between tide marks. Whidbey Island, 

 Wash., N.L.G., No. 302!, and in Collins, Holden and SetcheU, 

 P. B.-A., No. 905! 



Symploca laeteviridis Gomont. 



On mud-covered rocks near the upper tide limit. St. Michael, 

 Alaska, W.A.S., No. 5248x! 



The habit of this plant is slightly Symplocoid and the color 

 light green. The filaments measure 3 A 1 in diameter, are distinctly 

 torulose, and show a terminal cell either blunt or somewhat 

 pointed. It certainly seems strange to find a plant, hitherto 

 known only from the tropical locality of Key West, so far north, 

 but it is perhaps no greater surprise than finding a plant of 

 distinctly thermal waters, in cold waters. 



Symploca muscorum (Agardh) Gomont. 



Among mosses on damp ground. Newhall, Orcas Island, 

 Wash., N.L.G., No. 564! 



If, as seems to be the case, we are right in referring these 

 specimens to this species, they represent a very slender form, 

 as the triehomes are only 3 ^ in diameter. 



Plectonema roseolum (Richter) Gomont. 



On dripping rocks, intermingled with Rivularia and Hassallia. 

 West shore of Amaknak Island, Bay of Unalaska, Alaska, 

 W.A.S. and A.A.L., No. 4005! 



The specimen shows filaments which are only sparingly 

 branched, but with measurements and dotted dissepiments in 

 agreement with No. 191, Phykotheka Universalis. There is no 

 rosy tint perceptible in the composite mass. 



Microcoleus chthonoplastes (Flora Danica) Thuret. 



On mud in salt marshes. Whidbey Island, Wash., N.L.G., 

 Nos. 299!, 451!, 615!, and in Collins, Holden and Setchell, 

 P. B.-A., No. 906! 



Microcoleus tenerrimus Gomont. 



In a salt marsh. Whidbey Island, Wash., A. L. G., Nos. 

 302!, 615! 



