Benthic Algae — DAWSON 
443 
Callithamnion calif ornicum Gardner 
Smith, 1944 
Monterey Peninsula, Calif. 
Callithamnion ecmdoreanum Taylor 
Taylor, 1945 
Galapagos Arch. 
Callithamnion endovaginum Setchell & Gardner 
Kylin, 1941; Dawson, 1944, 1954 
La Jolla, Calif.; Guaymas, Sonora 
Callithamnion epiphyticum Taylor 
Taylor, 1945 
Galapagos Arch. 
Callithamnion laxum Setchell & Gardner 
Scagel, 1957 
Southern British Columbia and northern 
Wash.; Greg. 
Callithamnion marshallense Dawson 
Dawson, 196(H 
Bahia Uvita, Costa Rica 
Callithamnion pacijicum Taylor 
Dawson, 1954 
Isla Socorro, Revillagigedo Arch. 
Callithamnion paschale Bprgesen 
Dawson, 1957, 1959 
Isla San Benedicto, Revillagigedo Arch. ?; 
Gulf of Calif. 
Callithamnion pikeanum Harvey var. pikeanum 
Scagel, 1957; Dawson, 1959 c 
Vallenar Point, Alaska, to Point Dume, Calif. 
Callithamnion pikeanum var. pad f cum (Har- 
vey) Setchell & Gardner 
Scagel, 1957 
Shumagin L, Alaska, to Greg.; Point Mugu, 
Calif. 
Callithamnion ramosissimum Gardner 
Gardner, 1927c; Dawson, 1949 
Santa Catalina L, La Jolla, Calif. 
Callithamnion mpicolum Anderson f. mpicolum 
Smith, 1944; Dawson, 1954 
Fort Ross, Calif., to Isla Magdalena, Baja 
Calif. 
Callithamnion mpicolum f. pygmaeum Collins 
in Collins, Holden & Setchell 
Collins, Holden & Setchell, 1911 (P.B.A. 
1797); Dawson, 1949; Taylor, 1945 (as 
possibly C. mpicolum f . pygmaeum ) 
Santa Catalina L, Calif.; Galapagos Arch. 
Callithamnion socorriense Taylor 
Dawson, 1954 
Isla Socorro, Revillagigedo Arch. 
Callithamnion squarrulosum Harvey 
Harvey, 1853; J. Agardh, 1876 
Golden Gate ( San Francisco ) Calif. 
Callithamnion varispiralis Dawson 
Dawson, 1954 
Santa Catalina L, Calif.; Bahia Vizcaino, Baja 
Calif. 
Haloplegma mexicanum Taylor 
Dawson, 1954 
Isla Maria Magdalena, Nayarit 
Pleonosporium ahysicola Gardner 
Scagel, 1957 
Near Friday Harbor, Wash. 
Pleonosporium complanatum Taylor 
Taylor, 1945 
Galapagos Arch. 
Pleonosporium dasyoides (J. Agardh ) J. B. De 
Toni 
Dawson, 1954, 1959c 
Tomales Bay, Calif., to Punta Descanso, Baja 
Calif. 
Pleonosporium globulifemm Levring 
Dawson, 1957^, 1960a 
Puerto Guatulco, Oaxaca; Golfo de Nicoya, 
Costa Rica 
