538 



BULLETIN OP THE BUREAU OF FISHERIES. 



Chart 268. — Distribution of algae on Spindle Rocks, April 22, 1905. 



Rocks still very bare above low-water mark, where they were scraped clean during the winter by 

 floating ice. Cladophora lanosa var. uncialis (11) formed a green fringe on certain rocks near low- water 

 mark (the dotted line), with the brown algae Phyllitis fascia (24) and Scylosiphon lomentarins (26) begin- 

 ning to appear lower down; this rather imperfect brown zone was composed of young growth and was 

 not very conspicuous at this date. Well below low water were growths of the conspicuous red algae 

 Polysiphonia urceolata (47) and Chondrus crispus (49). 



List of species: Cladophora lanosa var. uncialis, 11, very abundant; Eciocarpus cEcidioides , 13, on 

 old Laminaria; Eciocarpus fasciculatus, 15, abundant on larger algae; Ectocarpus ovalus, 17, on mussel 

 shells; Ectocarpiis penicillatus, iS, very abundant on larger algae; Sorocarpus uvojformis, 21, on mussel 

 shells; Desmoirichum ballicum, 22, mixed with Scylosiphon; Desmolrichtim nndulaium, 23, mixed with 

 Scylosiphon; Phyllitis fascia, 24, young growlh on rocks; Scylosiphon lomcntarius, 26, young growth on 

 rocks; Dcsmarcstia viridis, 27, many young plants; Chordaria flagelliformis, 28, young plants; Chorda 

 tomentosa, 32; Laminaria Agardhii, ^;}; Acrochietium virgatulum, 39, on Ceramium; Ceramiuvi rubrum, 

 43; Polysiphonia urceolata, 47, abundant; Chondrus crispus, 49, abundant. 



