Benthic Algae — Dawson 
413 
Asymmetria expansa ( Setchell & Gardner ) Set- 
chell & Gardner 
Smith, 1944 
Monterey, Calif. 
FAM. HILDENBRANDIACEAE 
Hildenbrandia canariensis var. dawsonii Ardre 
Ardre, 1959; Dawson, 1954 (as H. prototypus 
var. kerguelensis)\ Dawson, Neushul & 
Wildman, 1960^ 
Central Baja Calif. 
Hildenbrandia galapagensis Setchell & Gardner 
Setchell & Gardner, 1937 
Galapagos Arch. 
Hildenbrandia occidentalis Setchell 
Taylor, 1945; Scagel, 1957; Dawson, Neu- 
shul & Wildman, 1960^ 
Northern British Columbia to Isla San Ge- 
ronimo, Baja Calif.; Galapagos Arch. 
Hildenbrandia prototypus Nardo 
Taylor, 1945; Dawson, 1954, 1954c, 1957£, 
1959, 1959c; Scagel, 1957 (in part as H. 
rosea ) 
Alaska to Panama; Galapagos Arch. 
fam. CORALLINACEAE 
Archeolithothamnium crosslandi Lemoine 
Taylor, 1945 
Galapagos Arch. 
Archaeolithothamnium howei Lemoine 
Lemoine, 1929; Dawson, 1960a 
Isla Coiba, Panama 
Archaeolithothamnium zonatosporum Foslie 
Foslie, 1906; Dawson, 1960*2 
Long Beach, Calif. ? 
Sporolithon pacificum Dawson 
Dawson, 1960^ 
Isla del Cano, Costa Rica 
Melobesia galapagensis (Foslie) Taylor 
Taylor, 1945 
Galapagos Arch. 
Melobesia marginata Setchell & Foslie 
Scagel, 1957; Dawson, 1959c, I960 
Southern British Columbia to Bahia Vizcaino, 
Baja Calif.; southern Gulf of Calif.; Re- 
villagigedo Arch.; Costa Rica 
Melobesia mediocris (Foslie) Setchell & Mason 
Scagel, 1957; Dawson, 1959c, I960; Dawson, 
Neushul & Wildman, I960 
Northern British Columbia to Isla Magda- 
lena, Baja Calif. 
Melobesia membranacea (Esper) Lamouroux 
Dawson, I960 
Cabeza Ballena, Baja Calif.; Isla San Bene- 
dicto, Revillagigedo Arch. 
Melobesia polystromatica Dawson 
Dawson, I960 
Bahia Tenacatita, Jalisco 
Lithothamnium aculeiferum L. Mason 
Dawson, I960 
Duxbury Reef, Calif., to Scammon Lagoon, 
Baja Calif. 
Lithothamnium australe (Foslie) Foslie 
Dawson, I960 
Isla Guadalupe, Baja Calif., to Bahia Honda, 
Panama. Gulf of Calif.; Revillagigedo 
Arch. 
? Lithothamnium bisporum Foslie 
Dawson, 1949 
Santa Catalina I., Calif. 
Lithothamnium calif ornicum Foslie 
Scagel, 1957; Dawson, 1959c, I960 
Southern British Columbia to Isla Magdalena, 
Baja Calif. 
Lithothamnium cottoni Lemoine 
Taylor, 1945 
Galapagos Arch. 
Lithothamnium fruticulosum (Kiitzing) Foslie 
Dawson, I960; Dawson & Beaudette, I960 
Bodega Bay, Calif., to Bahia Uvita, Costa 
Rica; Islas Revillagigedos; southern Gulf 
of Calif. 
