Benthic Algae— DAWSON 
445 
Hypoglossum abyssicolum Taylor 
Dawson, 1954 
Islas Las Tres Marias, Nayarit; Puerto Cub 
ebra, Costa Rica; Isla Gorgona, Colombia; 
Galapagos Arch. 
Hypoglossum. attenuatum Gardner 
Dawson, 1954 
Isia Guadalupe; San Ignacio Lagoon, Baja 
Calif.; northern Gulf of Calif. 
Hypoglossum retusum Dawson 
Dawson, 1954; Dawson, Neushul & Wild- 
man, 1960$ 
Isla Cedros; near Punta Eugenio, Baja Calif. 
Hemineura (?) howellii Taylor 
Taylor, 1945 
Galapagos Arch. 
Membranoptera denticulata (Montagne) Kylin 
Kylin, 1924; Setchell & Gardner, 1903 (as 
Pteridinm spinulosum ) 
Bering Sea to Morzhovoi Bay, Alaska 
Membranoptera dimorpha Gardner 
Scagel, 1957 
Queen Charlotte L, British Columbia, to Coos 
Bay, Oreg. 
Membranoptera multiramosa Gardner 
Doty, 1947 
Oreg. to Monterey, Calif. 
Membranoptera platyphylla (Setchell & Gard- 
ner) Kylin 
Scagel, 1957 
Southern British Columbia to Oreg. 
Membranoptera setchellii Gardner 
Gardner, 1926 
Morzhovoi Bay, Alaska 
Membranoptera spatulata Dawson 
Dawson ,1954 
Isla Patos, Sonora 
Membranoptera tenuis Kylin 
Scagel, 1957 
Northern Wash. 
Membranoptera weeksiae Setchell & Gardner 
Scagel, 1957 
Northern Wash.; San Francisco to San Diego, 
Calif. 
Pantoneura baerii (Ruprecht) Kylin 
Kylin, 1924 
Sitka, Alaska 
Pantoneura juergensii (J. Agardh) Kylin 
Kylin, 1924 
Bering Sea to Unalaska, Alaska 
Holme sia calif ornica (Dawson) Dawson 
Scagel, 1957 
Northern Wash.; San Diego, Calif. 
Schizoseris pygmaea Dawson 
Dawson, 1954, 1959 
Northern Gulf of Calif. 
Delesseria decipiens J. Agardh 
Scagel, 1957 
Prince William Sound, Alaska, to Carmel, 
Calif. 
Delesseria banco ckii Taylor 
Taylor, 1945 
Galapagos Arch. 
Platysiphonia clevelandii ( Farlow ) Papenfuss 
Scagel, 1957 
Northern Wash, to San Diego, Calif. 
Platysiphonia parva Silva & Cleary 
Silva & Cleary, 1954; Dawson, 1954 
Isla Guadalupe, Baja Calif. 
Taenioma perpusillum J. Agardh 
Dawson, 1954, 1959, 1960$ 
Gulf of Calif.; Isla Brincanco, Panama 
Erythroglossum calif ornicum ( j. Agardh) J. 
Agardh 
Doty, 1947; Dawson, 1958 
Oreg.; Monterey to Ventura, Calif. 
Erythroglossum intermedium ( J. Agardh ) Kylin 
Scagel, 1957 
Vancouver I., British Columbia 
