Benthic Algae-— DAWSON 
427 
Petrocelis frauds cana Setchell & Gardner 
Dawson, 1954, 1959 'c; Scagel, 1957; Dawson, 
1961 
Northern Wash, to Los Angeles Co., Calif.; 
Cabo Colnett, Baja Calif. 
Petrocelis haematis Hollenberg 
Hollenberg, 1943 
Southern Calif. 
Petrocelis middendorffii (Kuprecht) Kjellman 
Scagel, 1957 
Bering Sea to Whidbey Is., Wash. 
fam. NEMASTOMACEAE 
Scbizymenia epipkytica (Setchell & Lawson) 
Smith & Hollenberg 
Smith, 1944; Papenfuss, l94Aa 
Monterey Peninsula, Calif. 
Scbizymenia pacifica (Kylin) Kylin 
Scagel, 1957; Dawson, 1954, 1959c, 1961 
Unga L, Alaska, to Isla Magdalena, Baja Calif. 
Predaea masonii (Setchell & Gardner) J. De 
Toni 
Dawson, 1954; Feldmann, 1942; Dawson, 
1961 
Isla Guadalupe, Baja Calif.; Isla Clarion, Re- 
villagigedo Arch.; southern Gulf of Calif. 
Predaea subpeltata Dawson 
Dawson, 1961 
Puerto Guatulco, Oaxaca 
Platoma fanii Dawson 
Dawson, 1961 
Isla San Esteban, Gulf of Calif. 
fam. SEBDENIACEAE 
Sebdenia rubra Taylor 
Taylor, 1945 
Galapagos Arch. 
fam. SOLIERIACEAE 
Turner ella mertensiana ( Postels & Ruprecht) 
Schmitz 
Scagel, 1957 
Shumagin L, Alaska, to northern Wash. 
Eucbeuma uncinatum Setchell & Gardner 
Dawson, 1961 
Isla Angel de la Guarda, Gulf of Calif., to 
Mazatlan, Sinaloa 
Agardhiella tenera (J. Agardh ) Schmitz 
Dawson, 1959c (as A. coulteri ) , 1961 
Queen Charlotte Str., British Columbia, to 
Revillagigedo Arch.; Northern Gulf of 
Calif.; Galapagos Arch. 
Gardneriella tuberifera Kylin 
Hollenberg, 1948; Dawson, 1961 
Monterey Peninsula, Calif., to Punta Baja, 
Baja Calif. 
Opuntiella calif ornica ( Farlow ) Kylin 
Scagel, 1957 
Unga L, Alaska, to San Diego, Calif. 
Reticulobotrys catalinae Dawson 
Dawson, 1961 
Santa Catalina L, Calif.; Isla Guadalupe, Baja 
Calif. 
Sarcodiotheca dichotoma ( Howe ) Dawson 
Dawson, 1961 
Puerto Refugio to La Paz, Gulf of Calif. 
Sarcodiotheca divaricata Taylor 
Taylor, 1945 
Galapagos Arch. 
Sarcodiotheca furcata (Setchell & Gardner ) 
Kylin 
Scagel, 1957; Dawson, 1961 
Southern British Columbia to Islas Tres 
Marias Mexico; Puerto Culebra, Costa 
Rica; Galapagos Arch. 
Sarcodiotheca linearis Setchell & Gardner 
Dawson, 1961 
Isla Magdalena to San Lucas, Baja Calif. 
Sarcodiotheca taylorii Dawson 
Dawson, 1961 
Punta Frailes, Baja Calif.; Islas Tres Marias 
