544 BULLETIN OF THE BUREAU OF FISHERIES. 
CuarT 274.—Distribution of alge on Spindle Rocks, December 30, 1904. 
This chart plots the vegetation on the rocks in the winter before the upper parts are scraped clean by 
floating ice. In the series of charts it shows the conditions two and one-half months before those pre- 
sented on chart 267. The prevailing green alga was Cladophora lanosa var. uncialis (11), present on the 
upper portions of every rock above low-water mark (the dotted lines). Near low-water mark was a brown 
zone of Phyllitis fascia (24) and Scytosiphon lomentarius (26). Phyllitis fascia, which disappears in the 
summer, had returned in abundance. Below low water was a red zone of Ceramium rubrum (43), very 
plentiful, and in deeper water was the ever-present Chondrus crispus (49). Polysiphonia fibrillosa (46), so 
abundant September 19 (chart 273), had almost disappeared, and there wasno Polysiphonia violacea, gen- 
erally characteristic of the summer. Only a few plants of Nemalion multifidum (40) remained. 
List of alge: Calothrix scopulorum, 1, patcheson the top of Pyramid Rock; Ulva Lactuca var. rigida, 
5, bases of old plants; Enteromorpha intestinalis, 7, few scattered plants; Cladophora lanosa var. uncialis, 
11, abundant on the top of every rock; Ectocarpus granulosus, 16, abundant on Sargassum and other 
large alge below low-water; Ectocarpus tomentosus, 20, abundant on larger alge below low-water; 
Phyllitis fascia, 24, abundant above low-water; Scytosiphon lomentarius, 26, very abundant above low- 
water; Myrionema corunne, 30, on Laminaria; Laminaria Agardhii, 33, many old plants; Fucus vesicu- 
losus, 35, few scattered plants; Sargassum Filipendula, 36, few young plants; Porphyra laciniata, 37, 
scattered plants; Acrochetium secundatum, 38, on Porphyra; Acrochetium virgatulum, 39, on Ceramium; 
Nemalion multifidum, 40, few plants; Ceramium rubrum, 43, very abundant; Polysiphonia fibrillosa, 
46, few plants; Chondrus crispus, 49, abundant. 
@) 
