440 
PACIFIC SCIENCE, Vol. XV, July 1961 
Ceramium avalonae Dawson 
Dawson, 1954, 1960*2 
Santa Catalina L, Calif.; Isla Guadalupe, Baja 
Calif.; Puerto Culebra; Bahia Potrero 
Grande, Costa Rica 
Ceramium calif ornicum J. Agardh 
Dawson, 1954, 1959c; Scagel, 1957 
Southern British Columbia to Bahia Magda- 
lena, Baja Calif. 
Ceramium camouii Dawson 
Dawson, 1954, 1957 
Punta Banda; Bahia Vizcaino; Rocas Alijos, 
Baja Calif.; Gulf of Calif. 
Ceramium caudatum Setchell & Gardner 
Dawson, 1954, 1959 
Balboa Harbor; Santa Catalina I., Calif.; Isla 
Guadalupe Baja Calif.; Gulf of Calif. 
Ceramium clarionense Setchell & Gardner 
Dawson, 1954, 1957 
Balboa Harbor, Calif., to Isla Cedros; Rocas 
Alijos, Baja Calif.; Isla Jorge, Gulf of Calif, 
to Miramar, Nayarit; Revillagigedo Arch. 
Ceramium codicola J. Agardh 
Dawson, 1954; Scagel, 1957 
Sitka, Alaska, to Bahia Tortuga, Baja Calif. 
Ceramium eatonianum (Farlow) J. B. De Toni 
Doty, 1947: Dawson, 1954, 1959c 
Coos Bay, Oreg. to Isla Magdalena, Baja Calif. 
Ceramium equisetoides Dawson 
Dawson, 1954, 1951b 
Balboa Harbor, Calif.; Bahia Tepoca, Sonora 
to Mazatlan, Sinaloa; Golfo de Nicoya, 
Costa Rica 
Ceramium evermannii Setchell & Gardner 
Dawson, 1954 
Isla Guadalupe, Baja Calif. 
Ceramium fmbriatum Setchell & Gardner 
Dawson, 1954, 1959 
Punta Banda to Cabeza Ballena, Baja Calif.; 
Isla Angel de la Guarda, Gulf of Calif, to 
Acapulco, Guerrero 
Ceramium gardneri Kylin 
Doty, 1947; Dawson, 1950<7 
Coos Bay, Oreg., to Santa Cruz I. and Ventura, 
Calif. 
Ceramium gracillimum var. byssoideum (Har- 
vey) G. Mazoyer 
Dawson, 1950*7, 1954 (both as C. masonii ), 
1956, 1957&, 1959; Taylor, 1945 (as C. 
byssoideum ) 
Corona del Mar, Calif., to Cabeza Ballena, 
Baja Calif.; Gulf of Calif.; Costa Rica; 
Galapagos Arch. 
Ceramium hamatispinum Dawson 
Dawson, 1954 
Miramar, Nayarit 
Ceramium hoodii Taylor 
Taylor, 1945 
Galapagos Arch. 
Ceramium horridum Setchell & Gardner 
Dawson, 1954 
Gulf of Calif. 
Ceramium howellii Setchell & Gardner 
Setchell 8c Gardner, 1937; Dawson, 1957 
Galapagos Arch. 
Ceramium marsh aliens e Dawson 
Dawson, 1951b 
Golfo de Nicoya, Costa Rica 
Ceramium mazatlanense Dawson 
Dawson, 1954, 1954c, 1957£, 1959 b 
Kino, Sonora, to Salina Cruz, Oaxaca; Golfo 
Duke, Costa Rica; Isla San Benedicto, Re- 
villagigedo Arch.; Clipperton I. ? 
Ceramium nakamurai Dawson 
Dawson, \951b 
Golfo de Nicoya, Costa Rica 
Ceramium obesum Dawson 
Dawson, 1954 
Bahia Agua Duke, Isla Tiburon, Sonora 
