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PACIFIC SCIENCE, Vol. XV, July 1961 
Jania longiarthra Dawson 
Dawson, 1954, 1957*, 1959, 1959* 
Southern Gulf of Calif.; Golfo de Nicoya, 
Costa Rica; Clipperton I. 
Jania mexicana Taylor 
Dawson, 1954 
Mazatlan, Sinaloa, to Salina Cruz, Oaxaca 
Jania natalensis Harvey 
Dawson, 1954, 1958, 1959c 
Lechuza Point, southern Calif., to Isla Cedros, 
Baja Calif. 
Jania suhpinnata Dawson 
Dawson, 1954 
Bahia de La Paz, Gulf of Calif. 
Jania tenella Kiitzing var. tenella 
Dawson, 1954, 1954c, 1957, 1957 *, 1959, 
1959*, 1959c 
Southern Calif, to Costa Rica; Clipperton I. 
Jania tenella var. zacae Dawson 
Dawson, 1954, 1957* 
Bahia Vizcaino, Baja Calif.; Isla Ildefonso, 
Gulf of Calif.; Costa Rica 
Jania ungulata Yendo, prox. 
Taylor, 1945 
Galapagos Arch.; Guayas, Ecuador 
Amphiroa annulata Lemoine var. annulata 
Dawson, 1954, 1957, 1957*, 1959 
Central Baja Calif.; Southern Gulf of Calif, 
to Costa Rica; Galapagos Arch. 
Amphiroa annulata var. pinnata Dawson 
Dawson, 1954, 1957* 
Cape district, Baja Calif.; Golfo Dulce, Costa 
Rica? 
Amphiroa beauvoisii Lamouroux 
Dawson, 1957* 
Costa Rica 
Amphiroa brevianceps Dawson 
Dawson, 1954; Dawson, Neushul & Wild- 
man, 196(k 
Punta San Hipolito, Baja Calif.; Guaymas ?, 
Punta Frailes ?, Gulf of Calif.; Salina Cruz, 
Oaxaca 
Amphiroa compressa Lemoine 
Taylor, 1945 (as probably equal to the A. 
dilatata of Farlow, 1902) 
Galapagos Arch. 
Amphiroa crossiandii Lemoine 
Dawson, 1954, 1957 
Rocas Alijos, Baja Calif.; Isla Socorro, Revil- 
lagigedo Arch. ?; Tangola-Tangola, Oaxaca; 
Isla Gorgona, Colombia 
Amphiroa dimorpha Lemoine var. dimorpha 
Dawson, 1954, 1954c, 1957*, 1959; Dawson, 
Neushul & Wildman, I960, 1960^; Taylor, 
1945 
Central Pacific Baja Calif, to Central Amer- 
ica; Gulf of Calif.; Islas Revillagigedos; 
Galapagos Arch. 
Amphiroa dimorpha var. digitiforme Dawson 
Dawson, 1959 
Isla Carmen; Isla Ildefonso, Gulf of Calif. 
Amphiroa drouetii Dawson 
Dawson, 1954, 1959 
Central and southern Gulf of Calif. 
Amphiroa foliacea Lamouroux 
Dawson, 1954 
Punta Verlero, Bahia Vizcaino, Baja Calif.; 
Isla Maria Magdalena, Nayarit 
Amphiroa epiphlegnoides J. Agardh, in Harvey 
Harvey, 1862 
Fuca Strait, Wash. 
Amphiroa franciscana Taylor var. frauds cana 
Dawson, 1954 
Isla Guadalupe, Baja Calif.; Isla Maria Mag- 
dalena, Nayarit; Esmeraldas; Guayas, Ecua- 
dor 
