1916 Muenscher; on Shaw Island Algae 207 



Numerous hauls were made with a steam trawl in about 10 to 15 

 meters of water^ thus bringing to the surface many species of plants and 

 animals. Most of the algae of the deeper water were Rhodophyceae ; 

 only a few Phaeophyceae were dredged. The most common and abundant 

 species in the deeper water were Rhodymenia pertusa, Fauchea gardneri, 

 Nitophyllum latissimum, Callophyllis flahellulata, Dasyopsis plumosa, 

 and Agarum fimbriatum. Most of these algae were found growing on old 

 shells or on large pebbles. In the more shallow and rocky places the 

 Phaeophyceae seemed to be much more abundant. The most common 

 species in these places were Laminaria hullata, Costaria costata, Agarum 

 fimbriatum, and Nereocystis luetkeana. Cymathere triplicata, Laminaria 

 complanata and Pleurophycus gardneri were occasionally brought to the 

 surface. Other algae found in Indian Cove and vicinity are indicated 

 by figures on plate 36. 



A LIST OF MARINE ALGAE FOUND ON SHAW ISLAND 



The species are arranged according to their groups, from the highest 

 to the least developed. The figure preceding each species refers to the 

 figure by which it is indicated on the map (plates 35 and 36). The follow- 

 ing abbreviations indicate in general where the algae were observed most 

 frequently and also their relative abundance: uli = upper littoral; 

 L = littoral ; lli = lower littoral ; sli = sub-littoral ; va = very abund- 

 ant; A = abundant; c^ common; R = rare; va =: very rare; d = drifted 

 ashore. 



RHODOPHYCEAE 



1. Corallina officinalis L. — lli, a. 



2. Amphiroa tuberculosa (P. and R.) Endl. — sli, a. 



3. Constantinea rosa-marina (Gmelin) P. and R. — sli, c. 



4. Sarcophyllis californica J. Agardh — sli, c. 



5. Prionitis lyallii Harvey — li, r. 



6. Grateloupia cutleriae (Binder) J. Agardh — lli, r. 



7. Ptilota pectinata (Gunner) Kjellm. — li, r. 



8. Gloiopeltis furcata (P. and R.) J. Agardh — uli, va. 



9. Microcladia borealis Ruprecht — li, a. 



10. Ceramium codicola J. Agardh — li,i, c. 



11. Ceramium rubrum (Hudson) Agardh — lli, r. 



12. Ceramium californicum J. Agardh — sli, r. 



13. Platythamnion heteromorphtim typicum S. & G. — sli, r. 



14. Antithamnion floccosum pacificum (Harvey) S. & G. — sli, c. 



15. Pleonosporium vancouverianum J. Agardh — sli, vr. 



