Benthic Algae — DAWSON 
431 
Phyllophora suhmaritimus Dawson 
Dawson, 1961 
Cortes Bank, Calif.; Bahia Tortuga, Baja Calif. 
Petroglossum pacifcum Hollenberg 
Hollenberg, 1943, 1945; Doty, 1947; Kylin, 
1956 (as Phyllophora pacifcum ) 
Coos Bay, Or eg., to La Jolla, Calif. 
Petroglossum parvum Hollenberg 
Dawson, 1959c, 1961 
Laguna Beach, Calif., to Isla Cedros, Baja 
Calif. 
Ahnfeltia concinna J. Agardh 
Dawson 1954c, 1961; Scagel, 1957 
Southern British Columbia to Oaxaca, Mex- 
ico; Isla San Benedicto, Revillagigedo 
Arch. 
Ahnfeltia durvillaei (Bory) J. Agardh var. 
durvillaei 
Taylor, 1945 
Galapagos Arch. 
Ahnfeltia durvillaei var. implicata (Kiitzing) 
Howe 
Taylor, 1945 
Galapagos Arch. 
Ahnfeltia plicata (Hudson) Fries 
Okamura, 1933; Scagel, 1957; Dawson, 
1959c, 1961 
Bering Sea to Punta Baja, Baja Calif. 
Ahnfeltia svensonii Taylor 
Dawson, 1961 
Southern Gulf of Calif.; Galapagos Arch. 
Gymnogongrus ? carnosus Setchell & Gardner 
Dawson, 1961 
Isla San Pedro Martir, Gulf of Calif. 
Gymnogongrus crustiforme Dawson 
Dawson, 1961 
Salina Cruz, Oaxaca 
Gymnogongrus griff it hsiae var. galapagensis 
Piccone & Grunow 
Taylor, 1945 
Galapagos Arch. 
Gymnogongrus guadalupensis Dawson 
Dawson, 1961 
Isla Guadalupe; near Cabo San Lucas, Baja 
Calif. 
Gymnogongrus johnstonii ( Setchell & Gardner) 
Dawson 
Dawson, 1961 
Gulf of Calif, to Salina Cruz, Oaxaca; Bahia 
Salinas, Costa Rica; Revillagigedo Arch. 
Gymnogongrus leptophyllus J. Agardh 
Doty, 1947; Dawson, 1959c, 1961; Dawson, 
Neushul & Wildman, I960 
Oreg. to Punta Baja, Baja Calif. 
Gymnogongrus linearis (Turner) J. Agardh 
Doty, 1947 
Cape Perpetua, Oreg., to San Luis Obispo Co., 
Calif. 
Gymnogongrus martinensis Setchell & Gardner 
Dawson, 1961 
Isla San Martin to Isla Magdalena, Baja Calif. 
Gymnogongrus melanothrix Grunow 
Taylor, 1945 
Galapagos Arch. 
Gymnogongrus norvegicus (Gunner) J. Agardh 
Scagel, 1957 
Southern British Columbia to northern Wash. 
Gymnogongrus platyphyllus Gardner 
Scagel, 1957; Dawson, 1959c, 1961 
Southern British Columbia to Punta Santa 
Rosalia, Baja Calif. 
Gymnogongrus serenei Dawson 
Dawson, 1961 
Cabo San Lucas, Baja Calif.; Isla San Bene- 
dicto, Revillagigedo Arch. 
