BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



483 



number of stations (see chart 227). The greatest depths were between 1 7 and 1 9 fathoms 

 (chart 227) , and the average for this portion of the Sound was about 1 2 % fathoms. The 

 following is the list of algae found in the deeper waters of the westerly portion of Vineyard 

 Sound : 



Arthrocladia villosa, 7734, many; 7725, 7728 and 



7729, few. 

 Chorda filum, 7567, 7571, and 7591, few. 

 Cladostephus verticillatus, 7717, many; 7598 and 



7734, few. 

 Desmarestia aculeata, 7718, many; 7566, 7588, 7595, 



7596, 7719, 7720, and 7730, few. 

 Desmarestia viridis, 7731 (1907), many; 7677, 7678, 



7706, 7707, 7710, 7725, 7728, 7730, and 7734, few. 

 Dictyosiphon hippuroides, 7725, many; 7676, 7729, 



and 7730, few. 

 Ectocarpus siliculosus, 7717 and 7728, few. 

 Laminaria Agardhii, 7718, many; 7581 (1907), 7582 



7583. 7584. 7588. 7589. 7592- 7593- 7595. 7599' 



7677, 7702, 7703, 7706, 7719, and 7728, few. 

 Laminaria Agardhii var. vittata, 7582, 7583, 7679, 



7680, 7681, 7701, 7704, 7706, 7707, 7719, 7720' 



77 2 3. 7724. and 7731, few. 

 Laminaria digitata, 7593 and 7722, few. 

 Actinococcus subcutaneus, 7583 and 7595, few. 

 Agardhiella tenera, 7735, many; 7728, 7730, and 



7734, few. 

 Ahnfeldtia plicata, 7593, 7598, 7599, 7718, 7719, 



7720, 7721, 7724, and 7725, few. 

 Antithamnion cruciatum, 7724 and 7735, many; 



7566, 7571, 7690, 7720, 7730, and 7734, few. 

 Antithamnion plumula, 7678, few. 

 Callithamnion roseum, 7725, few. 

 Ceramium rubrum, 7721, many; 7571, 7575, 7576, 



7589. 7593- 7 6 76. 7680, 7701, 7704, 7710, 7717, 



7719, 7722, 7731 (1907), and 7734, few. 

 Ceramium tenuissimum, 7724, 7725, and 7726, 



many; 7730, few. 

 Champiaparvula, 7572 and 7724, many; 7566, 7567, 



7568, 7569, 7571, 7574, 7575, 757 6, 7578, 7588, 



7676, 7703, 7725, 7728, 7729, and 7734, few. 

 Chondrus crispus, 7718 and 7720, many; 7566, 7581 



(1907), 7582, 7583, 7584, 7585, 7589, 7591, 7596, 



and 7731 (1907), few. 

 Corallina officinalis, 7566, 7583, and 7596, few. , 



Cystoclonium purpurascens, 7720 and 7729, few. 

 Cystoclonium purpurascens var. cirrhosum, 7707, 



7730, and 7731 (1907), many; 7585, 7601, 7676, 



7678, 7686, 7692, 7693, 7703, 7706, 7717, 7718, 



7719, and 7722, few. 

 Dasya ckgans, 7734, few. 

 Delesseria sinuosa, 7701, 7719, and 7720, many; 



7582, 759L 7593- 7595. 7690. 7692, 7693. 7703. 



7709, and 7721, few. 

 Grinnellia americana, 7734 and 7735, many; 7575, 



7576. 7589. 7724. 7725. 7727. 7729, 7730, and 7736 > 



few. 

 Lomentaria rosea, 7593, 7708, and 7709, few. 

 Lomentaria uncinata, 7734 and 7735, few. 

 Melobesia pustulata, 7582, many. 

 Phyllophora Brodiaei, 7583, 7584, 7591, 7595, 7596, 



and 7598, few. 

 Phyllophora membranifolia, 7706, 7710, 7719, 7722, 



7725, and 7729, few. 

 Plumaria elegans, 7720, many; 7584, 7719, and 



7728, few. 

 Polyides rotundus, 7581 (1907), 7701, and 7717, few. 

 Polysiphonia elongata, 7685, 7701, 7723, and 7726, 



many; 7581 (1907), 7678, 7686, 7698, 7702, 7706, 



7709. 77i7. 7724, 7725. 7727. 7728, 7730, 7731 



(1907), and 7734, few. 

 Polysiphonia nigrescens, 7724, 7725, 7728, 7729, 



773o. 773 1 (1907). and 7734, many; 7581 (1907), 



7717, 7718, and 7726, few. 



Polysiphonia viylacea, 7681, 7704, and 7721, few. 

 Rhodomela Rochei, 7731 (1907), few. 

 Rhodymenia palmata, 7567, 7569, 7578, 7582, 7584, 

 758s. 7588, 7591, 7593. 7595, 7701, 7703, 7708, 



7718, 7719, 7720, 7723, 7724, 7728, 7729, and 

 7731 (1907), few. 



Seirospora Griffithsiana, 7728, many; 7729, few. 

 Spermothamnion Turneri, 7585, 7588, 7589, 7598, 



7717, and 7719, few. 

 Spyridia filamentosa, 7724, 7725, 7726, and 7735, 



many; 7571, 7572, 7588, and 7720, few. 



It is an interesting fact that the growths ef algae are most luxuriant nearest Gay 

 Head, the Cuttyhunk side of Vineyard Sound in the deeper waters being very barren of 

 vegetation. The depth is nowhere sufficiently great to be an important factor in 

 determining the distribution of the algae, for stations 7719 (17 fathoms), 7582, 7583, and 

 7584 (all about 15 fathoms) gave a large variety of species in considerable quantity. 

 Gravelly and rocky bottoms generally have the greatest quantity of vegetation. The 

 dredgings determined the presence of extensive areas of sand, which support little or 



