Benthic Algae— DAWSON 
371 
order ULOTRICHALES 
fam. ULOTRICHACEAE 
Ulothrix flacca (Dillwyn) Thuret, in Le Jolis 
Scagel, 1957 
St. Michael, Alaska, to Calif. 
Ulothrix implexa Kiitzing 
Scagel, 1957 
Bering Sea to Monterey, Calif. 
Ulothrix laetevirens (Kiitzing) Collins 
Scagel, 1957 
Una la ska, Alaska, to Calif. 
Ulothrix pseudoflacca f. minor Wille 
Setchell & Gardner, 1920 
Sitka, Alaska 
Ulothrix pseudoflacca f. major Wille 
Setchell & Gardner, 1920 
San Francisco, Calif. 
Ulothrix pseudoflacca f. maxima Setchell & 
Gardner 
Setchell & Gardner, 1920 
San Francisco, Calif. 
Ulothrix zonata (Weber & Mohr) Kiitzing 
Doty, 1947 
Harris State Park; Squaw Creek, Oreg. 
Hormidium rivulare Kiitzing 
Doty, 1947 
Winchester Bay, Oreg. 
fam. CHAETOPHORACEAE 
Bolbocoleon piliferem Pringsheim 
Setchell & Gardner, 1920; Dawson, 1945$ 
Southern Calif. 
Pilinia lunatiae f. simplex Thivy 
Taylor, 1945 
Panama City, Panama 
Pilinia maritima f. pacifca Thivy 
Taylor, 1945; Dawson, 1954 
Isla Clarion, Revillagigedo Arch.; Galapagos 
Arch. 
Phaeophila dendroides ( Crouan ) Batters 
Dawson, 1954 
Isla Maria Magdalena, Mayarit < 
Phaeophila engleri Reinke 
Taylor, 1945; Dawson, 1954 
Isla Clarion, Revillagigedo Arch., to Isla Ta- 
boga, Panama; Galapagos Arch. 
Phaeophila polymorpha Jao 
Scagel, 1957 
Northern Wash. 
Ectochaete perforans Thivy 
Taylor, 1945 
Galapagos Arch. 
Zygomitus reticulatus Bornet & Flahault 
Taylor, 1945 
Galapagos Arch. 
Entocladia cingens Setchell & Gardner 
Setchell & Gardner, 1920 
San Diego, Calif. 
Entocladia codicola Setchell & Gardner 
Smith, 1944; Dawson, 1945$ 
Monterey Peninsula to La Jolla, Calif. 
Entocladia condensata Setchell & Gardner 
Dawson, 1954 
Puerto Libertad; Isla San Esteban, Gulf of 
Calif. 
Entocladia mexicana Setchell & Gardner 
Dawson, 1954 
Isla Angel de la Guarda; La Paz, Gulf of Calif. 
Entocladia polysiphoniae Setchell & Gardner 
Dawson, 1954; Dawson, 1957 (as probably 
identical with E. viridis ) 
Guaymas; La Paz, Gulf of Calif. 
