BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 487 
The proportionate amount of algal life was very much greater in the deeper waters 
of this, the easterly portion of Vineyard Sound, than in the other regions, and there 
were no extensive barren areas. The character of the algal flora was essentially similar 
to that in the narrow portion of the Sound. ‘The following species, however, present in 
the narrow portion, were not observed, although it is probable that all of the forms 
occur at times in this region: 
Chorda filum. Actinococcus subcutaneus. 
Chordaria flagelliformis. Ceramium fastigiatum. 
Desmarestia aculeata. Corallina officinalis. 
Desmarestia viridis. Cystoclonium purpurascens var. cirrhosum. 
Ectocarpus siliculosus. Melobesia membranacea. 
Mesogloia divaricata. Rhodomela subfusca. 
Ralfsia clavata. 
Some alge were found which are not recorded in the previous lists: Sphacelaria 
cirrhosa, Callithamnion tetragonum, Chondria dasyphylla, Melobesia Lejolisu, Polysiphoma 
fibrillosa, and Polysiphonia Harveyi. However, most of these latter were in small quan- 
tities, and the Melobesia Lejolisit and Polysiphonia Harveyi occur in relation to beds of 
Zostera. ‘The summer algal flora of the easterly portion of Vineyard Sound is clearly 
representative of the warm-water sublittoral formation. 
3. CERTAIN INSHORE REGIONS OF PARTICULAR INTEREST. 
It would be impossible in the limits of this paper to describe in detail the character 
of the vegetation along the entire coast line of Buzzards Bay and Vineyard Sound as 
determined from the dredgings at the inshore stations. There are, however, certain 
regions of particular interest because of various physiographical peculiarities, and of 
these the following will be briefly described: (1) Gay Head and vicinity, (2) the reefs 
of Sow and Pigs, (3) the passage of Woods Hole, (4) Robinsons Hole, (5) Quicks Hole, 
(6) Menemsha Bight, (7) Tarpaulin Cove, (8) Vineyard Haven, (9) Cove west of Cutty- 
hunk Neck, (10) the Middle Ground. 
(1) GAY HEAD AND VICINITY. 
The most interesting region in the limits of the Survey with respect to algal life is 
that around Gay Head. This area presents a greater luxuriance of growth and variety 
of species than any neighboring region, chiefly on account of the varied character of the 
bottom and also because a number of forms characteristic of cold waters are able to 
live on the exposed reefs and ledges. Conspicuous among these are Laminaria digitata, 
Delesseria sinuosa, Gymnogongrous norvegicus, Lomentaria rosea, Plumaria elegans, and 
Euthora cristata. Euthora cristata was dredged by W. G. Farlow off Gay Head in 8 to 10 
fathoms in September, 1871, but we have not been fortunate enough to find this striking 
species, indicating that it is not common. The conditions under which most of the 
alge of this region live are clearly those of the cool-water sublittoral formation. 
The region is complex and there are at least three clearly defined zones. The first 
zone (stations 50 and 51) is in shallow water and includes large rocks, some of which 
rise above the water, with sandy areas between them. The second zone (stations 44 
