542 BULLETIN OF THE BUREAU OF FISHERIES. 
: 26; Saree 
iil 2s 
Bo sew see tres. 
2B ee 35. 5 
; 
BM Davis, et. 
CHART 272.—Distribution of alge on Spindle Rocks, September 2, 1905. 
The rocks on September 2 presented an aspect similar to that on July 22 (chart 271) with some 
features, however, more pronounced. The prevailing green alga was Ulva Lactuca var. rigida (5) form- 
ing large patches on the tops of rocks. The most conspicuous brown algz were Chordaria flagelliformis 
(28), growing in large masses, sometimes as a zone below low-water mark (the dotted line), and old 
Scytosiphon lomentarius (26) forming patches higher upon the rocks. The most conspicuous zone (much 
more pronounced than in chart 271) was that near low-water mark composed of Ceramium rubrum (43) and 
Polysiphonia violacea (48). There was much less Nemalion multifidum (40), which, however, formed a 
zoneonrocks V, VII, and VIII. Chondrus crispus (49) was plentiful in deeper water below the Chordaria. 
List of alge: Calothrix scopulorum, 1, small patches on barnacles and rocks; Rivularia atra, 2, on 
barnacles; Ulva Lactuca var. rigida, 5, plentiful on tops of rocks; Enteromorpha crinita, 6, few plants; 
Enteromorpha prolifera, 8, few plants; Ectocarpus confervoides, 14, on old plants of Scytosiphon; Ecto- 
carpus fasciculatus, 15, abundant on Chordaria and Chorda; Scytosiphon lomentarius, 26, patches of old 
plants; Chordaria flagelliformis, 28, abundant; Chorda filum, 31, large patches; Laminaria Agardhii, 33, 
occasional plants; Fucus vesiculosus, 35, scattered plants; Porphyra laciniata, 37, scattered plants; Nema- 
lion multifidum, 40, abundant; Callithamnion Baileyi, 41, many on Chordaria; Callithamnion corym- 
bosum, 42, many on Chordaria; Ceramium rubrum, 43, very abundant; Dasya elegans, 45, occasional 
plants; Polysiphonia violacea, 48, very abundant; Chondrus crispus, 49, abundant; Champia parvula, 
50, occasional on Chordaria and rocks. 
