l8o SAUNDERS [416] 



Family CODIACE^^. 



Codium adhaerens (Cabr.) Ag. 



Dredged at Kadiak, at 15 meters depth (350). This species usually 

 grows between tide marks and its occurrence at this depth is exceptional. 



Forming flat expansions, adherent by the lower surface. 



Codium mucronatum califomicum J. Ag. 



Sitka (170). 



Forming a terete, dichotomously branching, fleshy, erect thallus; 

 filaments tipped with a short mucron. 



Family CHARACE^^} 



Chara contraria A. Braun. 

 In ponds and streams near Glacier Bay, very abundant (300) . 



Chara fragilis Desv. 



In a freshwater pond, Shumagin Islands (400) . 



Nitella acuminata subglomerata A. Braun. 



In a fresh water pond near Prince William Sound (300). 



Nitella opaca Ag. ? 



In a freshwater pond near Kadiak (419). 



Pttffi:OPHYCE^. 

 Family E CTO CAR PA CEyS. 



Phycocelis baltica (Reinke) Foslie. 



Forming minute tufts one mm. or less in diameter on Ralfsia 

 deusta. Sitka (169a). 



The erect filaments are unbranched, 200-300 11 long by 5—7 y- wide ; 

 cells 8— lo At long; plurilocular sporangia 60-80 ft. long, 6-9 /i wide, 

 borne on a 3-5-celled stalk, containing 20-30 uniseriate zoospores. 



Streblonema minutissima sp. nov. (Plate xlv, fig. 3.) 



Plant composed of penetrating filaments ramifying through the 

 cortical filaments of the host, from which arise short erect filaments 

 intermingled with the peripheral filaments of the host, which are 

 once or twice dichotomously branched bearing above a few short 

 branches that become transformed into uniseriate plurilocular spor- 

 angia 20-30 /i long by 3-5 p. wide. 



» Determined by Dr. T. F. Allen. 



