796 BULLETIN OF THE BUREAU OF FISHERIES. 



refer to stations, selected from those of the corresponding number in Vineyard Sound, 

 that were redredged in the following summer (1904). A few numbers followed by the 

 date (1907) refer to selected stations redredged in the summer of that year. In addition 

 to the numbered stations plotted upon the maps there are records for several special 

 trips of the author on the Genevieve of the Marine Biological Laboratory and the Blue 

 Wing. These were (i) off Devils Bridge, Gay Head, August 17, 1903 (Blue Wing}, (2) 

 Lobsterville Cove, Menemsha Bight, August 9, 1904 (Blue Wing}, (3) Menemsha Bight, 

 July 17, 1905 (Genevieve), and (4) cove west of Cuttyhunk Neck, July 27, 1905 (Gene- 

 vie-ve). For detailed information on the situation of the stations, dates of dredgings, 

 depths, character of the bottom, etc., the reader is referred to the "Description of 

 dredging stations occupied during the present Survey," section i, p. 201-218. 



The strong tidal currents of Vineyard Sound and Buzzards Bay carry large amounts 

 of algal debris, which is widely distributed along the bottom, frequently in stations 

 utterly foreign to the life habits of the species. The dredge very often brings up frag- 

 ments of this algal drift, which can generally be recognized by their water-worn appear- 

 ance and frayed ends. However, it is sometimes very difficult to 'be certain whether 

 such fragments are algal drift or have been torn from their attachment by the dredge. 

 We have endeavored to separate critically all clear evidence or probability of algal drift 

 from the records of growth in situ. The former will appear at the ends of the lists of 

 stations for certain species under the heading "Drifted fragments," and these records 

 must be understood to mean that the species does not, so far as we know, grow at that 

 station. 



The species are arranged alphabetically in the genera, which are grouped in families 

 following closely the classification presented in Engler and Prantl, "Die naturlichen 

 Pflanzenfamilien." The assembling into orders differs in important particulars from 

 the arrangement in the above treatment. Four classes are recognized, the Cyanophy- 

 ceae, Chlorophyceae, Phaeophyceae, and Rhodophyceae. 



The list aims to include all specific references in literature and published sets of 

 algae to the occurrence of the species within the limits of the survey. In this list, 

 only the author's name and date of publication appear, the full titles of the papers being 

 given in the bibliography at the end of the catalogue. P. B.-A. stands for the Phyco- 

 theca Boreali- Americana of Collins, Holden, and Setchell; A. A. B. Ex. for the Algae 

 Americanse Boreales Exsiccatse of Farlow, Anderson, and Eaton; A. A. D. Ex. for the 

 Algae Aquae Dulcis Exsiccatae of Wittrock and Nordstedt. The authorities for the 

 specific names are, with few exceptions, those given in the Phycotheca Boreali- 

 Americana and in "Preliminary Lists of New England Plants: V. Marine Algae" by 

 Frank S. Collins (Rhodora, vol. n, p. 41-52, 1900). 



We are greatly indebted to Mr. Collins for a number of determinations and for his 

 kindly criticism of the manuscript. 



