Benthic Algae — DAWSON 
417 
Lithophyllum proboscideum var. delicatulum 
Dawson 
Dawson, I960 
Isla Guadalupe, Baja Calif. 
Lithophyllum (?) propinquum var. cocosica 
Lemoine 
Lemoine, 1929 
Isla Cocos, Costa Rica 
Lithophyllum reesei Dawson 
Dawson, I960 
Punta Banda, Baja Calif. 
Lithophyllum rileyi Lemoine 
Taylor, 1945 (as probably equal to the 
Lithothamnium eras sum of Piccone, 1889) 
Galapagos Arch. 
Lithophyllum samoense Foslie 
Dawson, I960 
Isla Cedros, Baja Calif. 
Lithophyllum sancti-georgei Lemoine 
Taylor, 1945 
Galapagos Arch. 
Lithophyllum trichotomum (Heydrich) Lemoine 
Dawson, 1957, I960 
Revillagigedo Arch.; Gulf of Calif, to Isla 
Jicaron, Panama; Galapagos Arch. 
Lithophyllum veleroae Dawson 
Dawson, I960 
Isla Espiritu Santo; vicinity of Santa Rosalia, 
Gulf of Calif. 
Lithophyllum whidbeyense Foslie 
Scagel, 1957 
Southern British Columbia to northern Wash. 
Heteroderma corallinicola Dawson 
Dawson, I960 
Guaymas, Sonora 
Heteroderma gibbsii (Foslie & Setchell) Foslie 
Dawson, I960 
Gulf of Calif. 
Heteroderma lejolisii (Rosanoff) Foslie 
Dawson, I960 
Bahia San Quint in, Baja Calif. 
Heteroderma minutula Foslie 
Dawson, 1959 h, I960 
Isla Guadalupe; Bahia Tortuga, Baja Calif.; 
Puerto Guatulco, Oaxaca, to Punta Na- 
ranja, Panama; Clipperton I. 
Heteroderma nicholsii Setchell & L. Mason 
Dawson, I960 
Bolinas, Calif., to Punta Abreojos, Baja Calif. 
Heteroderma parvicarpa Dawson 
Dawson, I960 
Scammon Lagoon, Baja Calif. 
Heteroderma subtilissima ( Foslie ) Foslie 
Dawson, I960 
Isla Guadalupe, Baja Calif.; southwestern- 
most Gulf of Calif. 
Litholepis accola Foslie 
Dawson, I960 
Isla Guadalupe, Baja Calif.; Isla Clarion, Re- 
villagigedo Arch. 
Litholepis fertilis (Lemone) Setchell & L. Mason 
Setchell & Mason, 1943 
Isla Coiba, Panama 
Litholepis sonorensis Dawson 
Dawson, I960 
Isla Espiritu Santo, Gulf of Calif. 
Choreonema thuretii (Bornet) Schmitz 
Taylor, 1945; Hollenberg, 1948; Dawson, 
1949, I960 
Southern Calif.; Isla Guadalupe to Bahia Viz- 
caino, Baja Calif.; southwestern Gulf of 
Calif.; Revillagigedo; Costa Rica; Gala- 
pagos Arch. 
Corallina bathybentha Dawson 
Dawson, 1949 
Southern Calif. Channel Islands 
