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PACIFIC SCIENCE, VoL XV, July 1961 
Pterosiphonia bipinnata (Postels & Ruprecht ) 
Falkenberg var. bipinnata 
Okamura, 1933; Scagel, 1957 
Aleutian I., Alaska, to San Pedro, Calif. 
Pterosiphonia bipinnata var. robusta (Gardner) 
Doty 
Scagel, 1957 
Sitka, Alaska, to Oreg. 
Pterosiphonia calif or nica Kylin 
Kylin, 1941; Hollenberg, 1948 
La Jolla, Calif. 
Pterosiphonia dendroidea ( Montagne ) Falken- 
berg 
Taylor, 1945; Scagel, 1957; Dawson, 1954, 
1959c; Dawson, Neushul & Wildman, 
1960 
Northern British Columbia to San Jose del 
Cabo, Baja Calif.; Galapagos Arch. 
Pterosiphonia gracilis Kylin 
Scagel, 1957 
Southern British Columbia to Coos Bay, Oreg. 
Pterosiphonia pennata (Roth) Falkenberg 
Dawson, 1954 
Bahia Tepoca, Sonora 
Levringiella gardneri ( Setchell ) Kylin 
Dawson, 1945c; Hollenberg 1948 (both as 
Stromato carpus gardneri ) ; Kylin, 1956 
Santa Monica to La Jolla, Calif. 
Pterochondria pygmaea ( Setchell ) Hollenberg 
Dawson, 1954; Dawson, Neushul & Wild- 
man, I960 
Southern Calif, to Bahia Asuncion, Baja Calif. 
Pterochondria woodii (Harvey) Hollenberg 
Scagel, 1957; Dawson, 1959c; Dawson, Neu- 
shul & Wildman, I960 
Vancouver, British Columbia, to Isla Asun- 
cion, Baja Calif. 
Herposiphonia grandis Kylin 
Scagel, 1957 
Southern British Columbia to Coos Bay, Oreg. 
Herposiphonia rigida Gardner var. rigida 
Scagel, 1957 
Southern British Columbia to Santa Monica, 
Calif. 
Herposiphonia rigida var. laxa Setchell & Gard- 
ner 
Dawson, 1949, 1954 
Santa Catalina I., Calif.; Isla Guadalupe, Baja 
Calif. 
Herposiphonia secunda (C. Agardh) Ambronn 
Taylor, 1945; Hollenberg, 1948; Dawson, 
1957, 1957 b, 1959, 1959*, 1959c 
Southern Calif, to Isla Jicarita, Panama; 
southern Gulf of Calif.; Clipperton I. 
Herposiphonia spinosa Dawson 
Dawson, 1959 
Isla Partida, Baja Calif, del Sur 
Herposiphonia subdisticha Okamura 
Dawson, 1954; Scagel, 1957 (both as H. 
parva) ; Dawson, 1954, 1951b , 1959, 1960a 
Northern Wash, to Isla Guadalupe; Islas San 
Benito, Baja Calif.; Gulf of Calif.; Golfo 
de Nicoya, Costa Rica 
Herposiphonia tenella (C. Agardh) Nageli 
Hollenberg, 1948; Dawson, 1954, 1954c, 
1957£, 1959 
Southern Calif, to Bahia Vizcaino, Baja Calif.; 
Kino, Sonora to Golfo de Nicoya, Costa 
Rica; Isla San Benedict©, Revillagigedo 
Arch. 
Herposiphonia verticillata ( Harvey ) Kylin 
Coe, 1932; Dawson, 1954, 1959c 
San Francisco, Calif., to Punta Santa Rosalia, 
Baja Calif. 
Amplisiphonia pacifica Hollenberg 
Dawson, 1954; Scagel, 1957; Dawson, Neu- 
shul & Wildman, I960, I960* 
Northern British Columbia to near Punta 
Eugenio, Baja Calif. 
