Benthic Algae- — DAWSON 
387 
Ralfsia banco ckii Dawson 
Dawson, 1954, 1954c 
San Jose del Cabo*, Baja Calif.; Isla San Bene- 
dicto, Revillagigedo Arch. 
Ralfsia besperia Setchell & Gardner 
Smith, 1944 
Carmel; Corona del Mar, Calif. 
Ralfsia occidentalis Hollenberg 
Dawson, 1954 
Isla Socorro, Revillagigedo Arch. 
Ralfsia pacifica Hollenberg, in Dawson 
Dawson, 1954; Scagel, 1957 
Unalaska, Alaska, to Baja Calif.; northern 
Gulf of Calif. 
Ralfsia pangoensis var. galapagensis Setchell & 
Gardner 
Setchell & Gardner, 1937 
Galapagos Arch. 
Hapterophycus canaliculatus Setchell & Gardner 
Dawson, 1954, 1959c 
Redondo, Calif., to Islas San Benito, Baja 
Calif. 
Lit ho derma fatiscens Areschoug 
Setchell & Gardner, 1925 
Bering Sea; Unalaska, Alaska 
Hapalospongidion gelatinosum Saunders 
Smith, 1944; Dawson, 1954 
Carmel, Calif., to Punta Banda, Baja Calif.; 
Bahia Petatlan, Guerrero 
order SPHACELARIALES 
fam. SPHACELARIACEAE 
Sphacelaria brevicorne Setchell & Gardner 
Dawson, 1954 
Vicinity of La Paz, Gulf of Calif. 
Sphacelaria calif ornica Sauvageau 
Setchell & Gardner, 1925 
San Pedro to San Diego, Calif. 
Sphacelaria didichotoma Saunders 
Smith, 1944 
Monterey to southern Calif. 
Sphacelaria furcigera Kiitzing 
Dawson, 1954, 1957£, 1959, 1959 b 
La Jolla, Calif., to Isla Magdalena, Baja Calif.; 
Gulf of Calif.; Golfo de Nicoya, Costa 
Rica; Clipperton L; Galapagos Arch. 
Sphacelaria banco ckii Dawson 
Dawson, 1954, 1959 
Bahia Viscaino, Baja Calif.; Gulf of Calif. 
Sphacelaria masonii Setchell & Gardner 
Dawson, 1954 
Isla Clarion, Revillagigedo Arch. 
Sphacelaria no vae- h 0 llandiae Sonder 
Dawson, 1954, 1951b 
Isla Guadalupe, Baja Calif.; Golfo Duke, 
Costa Rica 
Sphacelaria racemosa Greville 
Scagel, 1957 
Bering Sea to Oreg. 
Sphacelaria subfusca Setchell & Gardner 
Scagel, 1957 
Sitka, Alaska, to Redondo, Calif. 
Sphacelaria tribuloides Meneghini 
Dawson, 1959 
Isla San Diego, Gulf of Calif. 
order CUTLERIALES 
fam. CUTLERI ACE AE 
Cutleria banco ckii Dawson 
Dawson, 1954 
Northern Gulf of Calif. 
ORDER TILOPTERIDALES 
fam. TILOPTERIDACEAE 
Masonophycus paradoxa Setchell & Gardner 
Dawson, 1954 
Isla Clarion, Revillagigedo Arch. 
