Benthic Algae — D awson 
405 
Acrochaetium thuretii var. agama (Rosenvinge) 
Dawson 
Dawson, 1945*7 
San Pedro, Calif. 
Acrochaetium vagum (Drew) Jao 
Scagel, 1957 
Northern Wash, to Moss Beach, Calif. 
Acrochaetium variabile (Drew) G. M. Smith 
Dawson, 1954; Scagel, 1957; Dawson, 1954c 
Northern Wash, to Isla San Martin, Baja 
Calif.; Mazatlan, Sinaloa; Isla San Bene- 
dicto, Revillagigedo Arch. 
Kylinia arcuata ( Drew ) Kylin 
Dawson, 1954; Scagel, 1957 
Cape Flattery, Wash., to Moss Beach, Calif.; 
Isla Turner, Gulf of Calif. 
Kylinia eras sipes (Bprgesen) Kylin 
Dawson, 1954 
Bahia Vizcaino, Baja Calif.; Isla Rasa, Gulf of 
Calif. ? 
Kylinia hirsuta (Drew) Kylin 
Dawson, 1949; Scagel, 1957 
Vancouver, British Columbia; Santa Catalina 
I., Calif. 
Kylinia implicata ( Drew ) Papenfuss 
Papenfuss, 1947 
Moss Beach, Calif. 
Kylinia microscopica ( Nageli ) Kylin 
Kylin, 1944; Papenfuss, 1945 (as Chroma- 
strum micro scopicum) 
La Jolla, Calif. 
Kylinia moniliformis ( Rosenvinge ) Kylin 
Scagel, 1957 
Vancouver I., British Columbia 
Kylinia p or phyrae (Drew) Papenfuss 
Papenfuss, 1945 (as Chromastrum p or phy- 
rae) ; Dawson, 1954 
San Francisco; Monterey, Calif.; Bahia San 
Quintin, Baja Calif. 
Kylinia secundata ( Lyngbye ) Papenfuss 
Dawson, 1954 
Bahia Bocochibampo, Sonora 
Kylinia seriaspora Dawson 
Dawson, 1954 
Isla Turner, Gulf of Calif. 
Rhodochorton concrescens Drew 
Papenfuss, 1945 
Carmel Bay, Calif. 
Rhodochorton penicilliforme (Kjellman) Ro- 
senvinge 
Scagel, 1957 
Spruce I., Alaska, to San Juan Co., Wash. 
Rhodochorton purpureum (Lightfoot) Rosen- 
vinge 
Dawson, 1954; Scagel, 1957 
Bering Sea to Punta Eugenio, Baja Calif. 
Rhodochorton tenue Kylin 
Scagel, 1957 
San Juan I., Wash.; Santa Cruz, Calif. 
Audouinella memhranacea (Magnus) Papenfuss 
Scagel, 1957 
San Juan Co., Calif. 
fam. HELMINTHOCLADIACEAE 
Nemalion helminth oides (Velley) Batters 
Dawson, 1954; Scagel, 1957; Dawson, 1959c, 
1960a 
Sitka, Alaska, to Isla Magdalena, Baja Calif. 
Nemalion pulvinatum Grunow 
Dawson, 1954 
Bahia Agua Verde, Baja Calif. 
Nemalion virens J. Agardh 
Dawson, 1954 
Cabeza Ballena, southern Baja Calif.; Pacific 
Mexico, probably Oaxaca 
Helminth or a saundersii Gardner 
Smith, 1944 
Monterey, Calif. 
