488 BULLETIN OF THE BUREAU OF FISHERIES. 
to 49) comprises various reefs that lie off Gay Head, and especially the ledge known 
as Devils Bridge; these rocks are in 2 to 5 fathoms and the bottom between them is 
sandy. The third zone (stations 56-60, 7581 and 7731) is in deeper water outside of 
the reefs and has a rocky, gravelly, or sandy bottom in 5 to 12 fathoms. 
will be considered in order. 
These zones 
The first zone (stations 50 and 51) in shallow water was studied August 9, 1904. 
It comprised the following species, chiefly growing on rocks: 
Calothrix scopulorum (on piles). 
Chztomorpha area (on piles). 
Cladophora albida var. refracta. 
Enteromorpha intestinalis. 
Enteromorpha prolifera. 
Ulva Lactuca var. rigida. 
Chorda filum. 
Chordaria flagelliformis. 
Desmotrichum undulatum (on Zostera). 
Ectocarpus fasciculatus (on larger alge). 
Ectocarpus siliculosus (on larger alge). 
Fucus evanescens. 
Fucus vesiculosus. 
Fucus vesiculosus var. spherocarpus. 
Laminaria Agardhii. 
Laminaria digitata. 
Phyllitis fascia. 
Scytosiphon lomentarius. 
Ahnfeldtia plicata. 
Callithamnion Baileyi (on Chondrus). 
Ceramium rubrum (on Chondrus). 
Champia parvula. 
Chondrus crispus. 
Cystoclonium purpurascens var. cirrhosum. 
Nemalion multifidum. 
Pleonosporium Borreri (on larger alge). 
Polysiphonia fibrillosa. 
Polysiphonia nigrescens. 
Polysiphonia violacea. 
Rhodomela subfusca (on piles). 
Rhodymenia palmata. 
Spermothamnion Turneri. 
The second zone (stations 44 to 49) was also studied August 9, 1904. The list of 
species is as follows: 
Chzetomorpha melagonium, 44 and 45, few. 
Chorda filum, 47 and 49, few. 
Desmarestia aculeata, 46, 47, and 48, few. 
Desmarestia viridis, 46, few. 
Ectocarpus siliculosus, 44 and 45, few. 
Laminaria Agardhii, 44, 45, 46, 47, and 49, few. 
Laminaria Agardhii var. vittata, 44, 45, and 47, few. 
Laminaria digitata, 44 and 48, few. 
Ahnfeldtia plicata, 47 and 49, many; 44, 46, and 48, 
few. 
Ceramium fastigiatum, 44, few. 
Ceramium rubrum, 44, 45, 46, 47, and 48, few. 
Champia parvula, 49, many; 44, 46, and 47, few. 
Chondrus crispus, 44, 45, 46, 47, 48, and 49, many. 
Corallina officinalis, 47, many; 44, 45, and 48, few. 
Cystoclonium purpurascens, 44 and 49, many. 
Cystoclonium purpurascens var. cirrhosum, 44, 45, 
46, and 47, many; 48 and 49, few. 
Delesseria sinuosa, 45, many; 46, few. 
Grinnellia americana, 49, few. 
Lomentaria rosea, 45, few. 
Melobesia pustulata, 45, 46, 47, and 49, many; 44, 
few. 
Phyllophora Brodiei, 45,many; 44, 46, 47, 48, and 
49, few. 
Plumaria elegans, 44, few. 
Polyides rotundus, 46, 47, and 48, many; 44, few. 
Polysiphonia elongata, 44 and 45, many; 46, 47, 48, 
and 49, few. 
Polysiphonia nigrescens, 49, many; 47, rew. 
Polysiphonia violacea, 45 and 48, few. 
Rhodymenia palmata, 45, 46, and 47, many; 44 and 
48, few. 
Seirospora Griffithsiana, 49, few. 
Spermothamnion Turneri, 44, 45,and 46, many; 47 
and 49, few. 
The third zone (stations 56-60, 7581 and 7731) was studied August 15, 1904. The 
following list includes the species of the seven stations: 
Chzetomorpha melagonium, 56, 57, 58, and 60, few. | Laminaria Agardhii, 57, 59, 60, 7581 (1907), and 
Arthrocladia villosa, 56, many. 
Desmarestia aculeata, 57, many; 56, 59, 60, and 
7731, few. 
7731, few. 
Laminaria Agardhii var. vittata, 57 and 7731, many; 
59 and 60, few. 
Desmarestia viridis, 57, 58, 7731, and 7731 (1907), | Ralfsia clavata, 57, many; 56, 58, and 59, few. 
many; 59, few. 
Ahnfeldtia plicata, 60, few. 
