Benthic Algae — Dawson 
403 
Porphyra schizophylla Hollenberg 
Doty, 1947 
Harris State Park; Otter Point, Oreg.; Pesca- 
dero Point, Calif. 
Porphyra thuretii Setchell & Dawson, in Dawson 
Doty, 1947; Dawson, 1954, 1959c 
Chetco Cove, Oreg., to Isla Magdalena, Baja 
Calif.; Gulf of Calif.; Puerto Parker, Costa 
Rica 
Porphyra tenuis sima (Stroemfelt) Setchell & 
Hus 
Setchell & Gardner, 1903 
Shumagin I.; Yakutat Bay, Alaska 
Porphyra umbilicalis (Linnaeus) Kiitzing 
Scagel, 1957 (but with incorrect authorship) 
St. Paul I., Alaska, to southern British Colum- 
bia 
Porphyra variegata (Kjellman) Hus 
Scagel, 1957 
Southern British Columbia to Monterey, Calif. 
Porphyrella calif ornica Hollenberg 
Hollenberg, 1945 
Southern Calif. 
Porphyrella gardneri Smith & Hollenberg 
Hollenberg, 1945; Scagel, 1957 
Northern British Columbia to Monterey, 
Calif. 
Porphyropsis coccinea (J. Agardh) Rosenvinge 
Scagel, 1957 
Friday Harbor, Wash. 
Conch ocelis rosea Batters (probably represents 
a stage in the life cycle of one or more 
species of Porphyra ) 
Scagel, 1957 
Northern Wash. 
subclass FLORIDEOPHYCIDAE 
ORDER NEMALIONALES 
fam. ACROCHAETIACEAE 
Acrochaetium amphiroae (Drew) Papenfuss 
Dawson, 1945 b (as Rhodochorton amphi- 
roae ); Doty, 1947; Dawson, 1954 
Oreg. to Isla Cedros, Baja Calif. 
Acrochaetium angustum (Drew) Papenfuss 
Papenfuss, 1945 
Santa Catalina I., Calif. 
Acrochaetium ascidiophilum Dawson 
Dawson, 1954 
Bahia San Quintin, Baja Calif. 
Acrochaetium bonnemaisoniae (Batters) J. & 
G. Feldmann 
Dawson, 1954 
Punta San Quintin, Baja Calif. 
Acrochaetium bornetii Papenfuss 
Dawson, 1954 
San Pedro, Calif.; Punta Pequena, Baja Calif. 
Acrochaetium coccineum (Drew) Papenfuss 
Papenfuss, 1945 
Marin Co.; San Francisco, Calif. 
Acrochaetium daviesii (Dillwyn) Nageli 
Dawson, 1954; Dawson, Neushul & Wild- 
man, 1960a 
Carmel, Calif., to Isla Clarion, Revillagigedo 
Arch. 
Acrochaetium densum (Drew) Papenfuss 
Papenfuss, 1945 
San Francisco, Calif. 
Acrochaetium desmarestiae Kylin 
Scagel, 1957 
Northern Wash, to Oreg. 
Acrochaetium dictyotae Collins 
Papenfuss, 1945 
San Diego Co., Calif. 
