Benthonic Algae — S cagel 
529 
TABLE 1 ( continued ) 
98. Ahnfeltia concinna J. Agardh 
99- Rhodoglossum latissimum J. Agardh 
100. Iridaea lineare (Setchell et Gardner) Kylin 
101. Ahnfeltia plicata (Hudson) Fries 
102. Schizymenia pacifica Kylin 
103. Rhodoglossum affine (Harvey) Kylin 
104. Flustrella corniculata (Smitt) 
105. Mytilus calif ornianus Conrad 
106. Mitella polymerus (Sowerby) 
107. Pisaster ochraceus (Brandt) 
108. Balanus glandulus (Darwin) 
109- Styela montereyensis (Dali) 
110. Haliotis kamtschatkana Jones 
111. Strongylocentrotus drohachiensis (Muller) 
112. Strongylocentrotus purpuratus (Stimpson) 
113. Strongylocentrotus francis canus (Agassiz) 
114. Mytilus edulis Linnaeus 
115. Littorina planaxis Phillippi 
116. Dictyoneurum calif ornicum Ruprecht 
117. Phyllospadix scouleri Hooker 
118. Zostera marina L. var. marina 
119- Balanus nubilus Darwin 
120. Ulva latissima L. 
121. Rhizoclonium riparium (Roth) Harvey 
122. Porphyrella gardneri Smith et Hollenberg 
123. Desmarestia ligulata (Lightfoot) Lamouroux 
124. Amplisiphonia pacifica Hollenberg 
125. Rhodymenia pertusa (Postels et Ruprecht) J. 
Agardh 
126. Pterochondria woodii (Harvey) Hollenberg 
mopolitan in their distribution, particularly in 
their tolerance to extreme dilution. Extending 
throughout the Strait (Fig. 49) are forms such 
as Alaria tenuifolia Setchell f. tenuifolia, Cym- 
athere triplicata (P. and R.) J. Ag., Cost aria 
costata (Turn.) Saunders, C. mertensii J. Ag., 
Laminaria saccharina ( L. ) Lamour. f . saccharina, 
Nereocystis luetkeana (Mert. ) P. and R., Por- 
NUMBER OF TIMES EXPOSED (1953) 
0 200 400 600 800 1000 1200 1400 
10 20 30 40 50 60 70 80 90 100 
NUMBER OF TIMES EXPOSED (%) 
Fig. 44. Diagram showing number (and per cent) 
of times tidal condition caused exposure of various 
regions in the intertidal zone. 
phyra perforata J. Ag. f. perforata, Rhodomela 
larix (Turn.) C. Ag., 0 donthalia floccosa 
(Esper) Falk., Mytilus edulis Linnaeus, Lit- 
torina planaxis Philippi, and Strongylocentrotus 
drohachiensis (Muller). 
Restricted to the region of highest salinity, 
as at Hope I., are Postelsia palmaeformis Rupr., 
Lessoniopsi* littoralis (Farl. andSetch.) Reinke, 
Laminaria setchellii Silva, Pelvetiopsis limit at a 
(Setchell) Gardner f. limitata, Dilsea calif or - 
nica (J. Ag.) O. Kuntze, Erythrophyllum deles- 
serioides J. Ag., Iridaea lineare (S. and G.) 
Kylin, Hymenena s etchellii Gardner, Ptilota 
asplenioides (Esper) C. Ag., P. calif ornica Rupr., 
P. hypnoides Harvey, Mitella polymerus (Sow- 
erby ) , and Flustrella corniculata ( Smitt ) . 
A smooth form of Hedophyllum sessile (C. 
Ag.) Setch., Pleurophycus gardneri Setch. and 
Gardner, and Styela montereyensis Dali are also 
present in regions of highest salinity, but are 
somewhat less restricted in their distribution 
and extend into the Strait as far as Deer L 
A few organisms extend still farther into the 
Strait but only slightly beyond Deer I. Among 
these are Alaria nana Schrader and A. marginata 
P. and R. Still others extend from Hope I. 
throughout the Deer I. region and as far as 
Malcolm L, but not as far as the east and north 
sides of the Strait. Among these are Mytilus 
calif ornianus Conrad, Strongylocentrotus pur- 
puratus (Stimpson), Macro cystis integrifolia 
Bory, Egregia menziesii (Turner) Aresch. subsp. 
menziesii, the typical bullate form of Hedophyl- 
lum sessile (C. Ag.) Setch., Alaria valida 
