Benthic Algae— Dawson 
451 
Polysiphonia urceolata (Lightfoot) Greville 
Okamura, 1933; Segi, 1951; Scagel, 1957 
Aleutian L, Alaska, to northern Wash. 
Tayloriella dictyums (J. Agardh) Kylin 
Kylin, 1956; Dawson, 1954 (as Bryocladia 
dictyums ) 
Bahia Petatian, Guerrero; Pochetti, Oaxaca ? 
Bryocladia borealis Dawson 
Dawson, 1954 
Campo Malarrimo, Bahia Vizcaino, Baja Calif. 
Ophidocladus calif ornica (Hollenberg) Kylin 
Kylin, 1956; Dawson, I960*; Hollenberg, 
1943 (as Rbodosiphonia ) 
Santa Barbara to San Diego, Calif. 
Digenia simplex (Wulfen) C. Agardh 
Dawson, 1954, 1957$, 1959 
Gulf of Calif, to Costa Rica ■ 
Bryothamnion pacificum Taylor 
Dawson, 1954 
Bahia Vizcaino, Baja Calif.; Is la Maria Mag- 
dalena, Nayai.it 
Bostrycbia binderi Harvey 
Taylor, 1945; Dawson, 1957$ 
Golfo Duke, Costa Rica; Galapagos Arch. 
Bostrichia calliptera (Montagne) Montagne 
Taylor, 1945 
Panama; Choco, Bahia Buenaventura; Isla 
Gorgona, Colombia; Galapagos Arch. 
Bostrycbia radicans Montagne 
Taylor, 1945; Dawson, 1954, 1957$; Post 
1955 (as B. radicans f. moniliforme ) 
Guaymas, Sonora; Barra de Navidad, Jalisco; 
El Salvador; Golfo Duke, Costa Rica; 
Choco, Bahia Buenaventura, Colombia; 
Galapagos Arch. 
Bostrycbia simplicins cula Harvey ex J. Agardh 
Dawson, 1957$ 
Golfo de Nicoya, Costa Rica 
Bostrycbia tenella J. Agardh 
Taylor, 1945 
Galapagos Arch. 
Lophosipbonia macra (Harvey) Falkenberg 
Dawson, 1954c 
Isla San Benedicto, Revillagigedo Arch. 
Lophosipbonia mexicana Dawson 
Dawson, 1954 
Isla Cedros, Baja Calif.; Isla Angel de la 
Guarda, Gulf of Calif.; Isla Clarion, Re- 
villagigedo Arch. 
Lophosipbonia reptabunda (Suhr) Kylin 
Kylin, 1956; Dawson, 1957$, 1959c (pos- 
sibly confused with Ophidocladus ); Scagel, 
1957 (as L. obscura) ; Hollenberg, 1958 a 
(as L. obscura) 
Southern British Columbia to northern 
Wash.; southern Calif. ?; Costa Rica ? 
Lophosipbonia scopulorum (Harvey) Womer- 
sley 
Dawson, 1957$, 1959, 1959c, 1954 (as L. 
villum ) ; Scagel, 1957 (as L. villum) 
Southern British Columbia to Isla Magdalena, 
Baja Calif.; Gulf of Calif. 
Brogniartella mucronata ( Harvey ) Schmitz 
Dawson, 1954; Kylin, 1956 (as probably a 
species of Micropeuce ) 
Isla Maria Magdalena, Nayarit 
Veleroa subulata Dawson 
Dawson, 1954 
Bahia Tepoca, Sonora 
Pterosipbonia arctica Setchell & Gardner 
Okamura, 1933; Scagel, 1957 
Aleutian L, Alaska, to Puget Sound, Wash. 
Pterosipbonia baileyi (Harvey) Falkenberg 
Dawson, 1954, 1959c; Dawson, Neushul & 
Wildman, I960 
Crescent City, Calif., to Isla San Roque, Baja 
Calif. 
