486 



BULLETIN OF THE BUREAU OF FISHERIES. 



nellia americana, Phyllophora Brodiwi, Phyllophora mcmbrani folia, and Spermothamnion 

 Turneri; these species are found at 12 or more stations each, and may be considered 

 the dominant forms. The list in general clearly shows that the algae of the summer in 

 the deeper waters of the narrow portion of Vineyard Sound belong to the warm-water 

 sublittoral formation. 



The easterly portion of Vineyard Sound" included in this Survey is a triangular 

 region between a line drawn from Nobska Point to West Chop and a line between Fal- 

 mouth Heights and East Chop. The bottom here is much more stony than in the 

 westerly portion of the Sound (see chart 227). While there is considerable sand in spots, 

 there are no sandy areas so extensive as to include several stations. This region, there- 

 fore, may be described in general as gravelly, stony, and rocky, with sand in spots. 

 The greatest depths were about 13 fathoms (chart 227), the average about 9 fathoms. 



The following algae were found in the easterly portion of the Sound: 



Arthrocladia villosa, 7755, few. 



Cladostephus verticillatus, 7760, 7771, and 7779, 



few. 

 Dictyosiphon hippuroides, 7760, few. 

 Laminaria Agardhii, 7755, 7767, 7775. and 7776, 



few. 

 Ralfsia clavata, 7780, few. 

 Sargassum Filipendula, 7755, 7760, 7763, 7764, 



7766, 7767, 7772, 7775, 7776, 7778, 7780, 7781, 



and 7783, few. 

 Sphacelaria cirrhosa, 7760 many; 7772, few. 

 Agardhiella tenera, 7778 many; 7755, 7758, 7760, 



7763. 7763 (i9°7). 7764. 7765. 7766. 7766 (1907), 



777'. 7772. 7775. 7777. 7779. 7780, 7781, 7782, and 



7783, few. 

 Ahnfeldtia plicata 7760, few. 

 Antithamnion cruciatum, 7764, 7768, 7770, 7772, 



7773. and 7774. many; 7757, 7760, 7765, 7766, 



7771. 7774. 7779. and 7780, few. 

 Callithamnion Baileyi, 7768 and 7772, many; 7778, 



few. 

 Callithamnion roseum, 7764, 7767, 7770, 7771, 7772, 



7774. 7775. and 7776, many; 7756, 7759, 7766, 7768, 

 7769, 7773. 7778. 7779. 7780, 7781, and 7782, few. 



Callithamnion tetragonum, 7764, 7765,and 7766, few. 

 Ceramium rubrum, 7755, many. 

 Ceramium strictum, 7763 and 7764, few. 

 Ceramium tenuissimum, 7777 and 7783, many; 7781, 



few. 

 Champiaparvula, 7760, 7764, 7775, and 7776, many; 



7756, 7757. 7758. 7759. 7763. 7763 (1907). 7765. 



7766, 7767, 7769, 7770, 7771, 7772, 7774, 7777, 



7778, 7779, 7780, 7781, 7782, and 7783, few. 

 Chondria dasyphylla, 7755, 7774, 7777, 7778, 7781, 



7782, and 7783, few. 

 Chondruscrispus, 7764, 7766, and 7768, many; 7759, 



7760, 7763 (1907), 7765, 7767, 7769, 7770, 7771, 



7772. 7777. 7779. and 7781, few. 



Cystoclonium purpurascens, 7760, few. 



Dasya elegans, 7775, many; 7755, 7768, 7770, 7777, 



7778, 7779. 7780, 7781, 7782, and 7783, few. 

 Gracilaria multipartita, 7766, few. 

 Grifiithsia Bornetiana, 7755, 7778, and 7782, few. 

 Grinnellia americana, 7755, 7756, 7758, 7759, 7760, 



7763. 7764, 7766, 7767, 7768, 7771, 7772, 7774, 

 7775. 7776. 7777. 7778. 7779. 7780, 7780 (1907), 

 7781, 7782, and 7783, few. 



Hildenbrandia prototypus, 7757, 7759, 7760, 7766, 



7777. 7778. and 7780, few. 

 Lithothamnion polymorphum, 7760, many; 7757, 



7763 (1907). 7764. 7766, 7767, 7769, 7772, and 



7778, few. 



Lomentaria uncinata, 7760, many; 7757, 7759, 7763, 



7764, 7766, 7777, 7778, 7781, and 7782, few. 

 Melobesia Lejolisii, 7779, 7780, and 7782, many. 

 Melobesia pustulata, 7768 and 7770, many; 7764 



and 7765, few. 

 Phyllophora Brodiaei, 7763 (1907) and 7766, few. 

 Phyllophora membranifolia, 7770 and 7775, many; 



7755. 7759. 7760, 7764, 7765, 7766, 7768, 7769, 



7772, 7774, 77S0, 7782, and 7783, few. 

 Polyides rotundus, 7759 and 7766, few. 

 Polysiphonia elongata, 7760, 7766, 7772, and 7780, 



few. 

 Polysiphonia fibrillosa, 7759, few. 

 Polysiphonia Harveyi, 7778, 7779, 7780, 7781, 7782, 



and 77S3, few. 

 Polysiphonia nigrescens, 7760 and 7763 (1907). few. 

 Polysiphonia violacea, 7780. few. 

 Rhodymenia palmata, 7755, few. 

 Spermothamnion Turneri, 7764, 7770, 7772, and 



7775, many; 7755,7759, 7760, 7763, 7771, 7774, 



7777. 7779. 7780, 7781, and 7782, few. 

 Spyridia filamentosa, 7776, many; 7759, 7760, 7763, 



7763 (1907), and 7783, few. 



o As stated before, this region might be considered as within the limits of Nantucket Soimd if an arbitrary line were drawn 

 between this body of water and Vineyard Sound. 



