BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



485 



Ceramium tenuissimum, 7542bis, many; 753obis, 



7S4ibis, 7S54bis, 7559, and 7565^5, few. 

 Champia parvula, 7549 b is, 7732, 7733, 7745,. 7749. 



7752, and 7754, many; 7521, 7521 (1907), 7S23bis, 



75 2 S. 75 2 5 bis . 7526 (1907), 7533bis, 7534. 754i, 



7S4ibis, 7542, 7542 (1907), 7543 (1907). 7547. 7549 



(1907). 755L 755i (1907). 7553. 7554. 7554bis, 



7557. 7559- 756o, 7562, 7565 bis > 7739. 7741, 7746, 



and 7753, few. 

 Chondrus crispus, 7521 (1907), 7533bis, and 7749, 



many; 7523bis, 7524bis, 752sbis, 7536, 7542bis, 



7554, 7554bis, 7560, 7561, 7562, 7732, 7739, and 



7746, few. 

 Corallina officinalis, 753ibis, many. 

 Cystoclonium purpurascens, 7524bis, 752sbis, 



7542 (1907), and 7549 (1907), few. 

 Cystoclonium purpurascens var. cirrhosum, 39, 



7523. 7534, and 7740, few. 

 Dasya elegans, 7733, 7751, and 7753, few. 

 Delesseria sinuosa, 39, few. 

 Gracilaria multipartita, 7554bis, few. 

 Griffithsia Bornetiana, 7533bis, 7749, and 7754, few. 

 Grinnellia americana, 7542 and 7733, many; 7521, 



7521 (1907), 75 2 5 bis > 7527, 753 lbis . 7536. 7537. 



7540, 7541, 7546, 7547. 7549. 755 1 . 7553- 7554. 



7556bis, 7557, 7559, 7560, 7562, 7565^3, 7732, 



7737. 774L and 7753, few. 

 Hildenbrandia prototypus, 7544bis and 7547bis, 



many; 7533bis, 7546bis, and 7747, few. 

 Lithothamnion polymorphum, 7524bis, 7525bis, 



7533 bis . 7S34bis, and 7544bis, many; 7534, 7535bis, 



7539- 7539 b is, and 7752, few. 



The narrow portion of Vineyard Sound as well as the westerly portion presents 

 some large areas practically devoid of vegetation for the reason that the bottom is 

 sandy. The chief of these regions are around stations (7556, 7562, 7563, 7564, 7565, 

 7697). (7547. 7549. 755o, 755i. 7552, 7553), (7536, 7539. 7543, 7544. 7545. 7736, 7737), 

 (7530, 7530, (752i, 7522, 7527, 7528, 7529, 7532, 7533). 



The more varied character of the bottom in the deeper waters of the narrow portion 

 of the Sound gives a larger representation of algae, both in abundance and in number of 

 species, than the westerly portion. Certain species appear which were not noted or were 

 uncommon in the deeper waters of the westerly portion: Chordaria flagelliformis , 

 Mesogloia divaricata, Sargassum Filipendula, Ralfsia clavata, Callithamnion Baileyi, 

 Ceramium Jastigiatum, Ceramium striatum, Gracilaria multipartita, Griffithsia Bornetiana, 

 Hildenbra-ndia prototypus, Lithothamnion polymorphum, Melobesia membranacea, and 

 Rhodomcla subfusca. 



Other species characteristic of more open waters are not present in this part of the 

 Sound or are very rare; conspicuous among these are Chcetomorpha melagonium, Lami- 

 naria Agardhii var. viltata, Laminaria digitata, Delesseria sinuosa, Lomentaria rosea, 

 Plumaria elegans, and Rhodymenia palmata. Considering the list as a whole, the most 

 striking features are the abundance and widespread distribution of Sargassum Filipen- 

 dula, Agardhiella tenera, Ceramium rubrum, Champia parvula, Chondrus crispus, Grin- 



Lomentaria uncinata, 7537, 7548, 7551, 7557, 7733, 



and 7751, few. 

 Melobesia Lejolisii, 7525bis, many. 

 Melobesia membranacea, 7739, few. 

 Phyllophora Brodiaei, 752ibis, 7523, 7524, 7525^3, 



7526 (1907), and 7533bis, many; 7522bis, 7524bis, 



7525, 753°. 7532, 7534, 7535, 7536, 7536bis, 7537, 



754i, 7542 (1907), 7739, 7744. and 7749, few. 

 Phyllophora Brodisei var. catenata, 7521 (1907), 



many. 

 Phyllophora membranifolia, 752ibis, 7525bis, 



753ibis, 7533bis, 7739, 7740, 7742, 7744, and 7749, 



many; 7523bis, 752 4 bis, 7530 (1907), 7542bis, 



7543 ( I 907).7549(i9°7).774i, 7743. 7745. and 7754, 



few. 

 Polyides rotundus, 7752, many; 7526 (1907), 7532bis, 



7533 bis - 7536. 754i b is, 7560, 7749, and 7751, few. 

 Polysiphonia elongata, 7557, 7733, 7739, 7751, 7752, 



and 7754, few. 

 Polysiphonia nigrescens, 7752, many; 7523^5, 7549 



(1907). 755 1 - and 755 1 (1907), few. 

 Polysiphonia violacea, 7523^3, few. 

 Rhodomela subfusca, 7554bis, few. 

 Rhodymenia palmata, 753obis, few. 

 Spermothamnion Turneri, 7525^3, 7533HS, and 



7749, many; 752ibis, 7524, 7526 (1907), 753obis, 



7537, 7542, 7548. 755 1 . 7553- 756o, 7562, 7739- 



774i, 775 1 - 7752, and 7754, few. 

 Spyridia filamentosa, 753obis, 7533bis, 7542, 7559, 



7562, 7741, and 7749, few. 



