56 BULLETIN OF THE BUREAU OF FISHERIES. 



with the others in the annotated list, and these records have been included in plotting 

 the distribution charts. 



During the summers of 1906, 1907, 1908, and 1909 various supplementary dredg- 

 ings were carried on with both the Fish Hawk and the Phalarope, and at least 150 sta- 

 tions were dredged. These were in most cases more or less approximate repetitions of 

 stations of the regular series. On most of these occasions search was made only for 

 particular species, and no list was kept of the entire collection of organisms brought 

 up. In the case of the hydroids, Bryozoa, and Foraminifera, however, and of unusual 

 species belonging to any group, the records derived from these supplementary stations 

 are to a large extent included with the others, the year of the dredging being indicated. 

 During the summer of 1909, 26 of the earlier stations in Buzzards Bay (mainly of the 

 Fish Hawk series) were repeated with rough approximation' by the Phalarope, and 

 fairly full lists were made of the organisms taken at each." These lists have been 

 appended to the regular series. Several trips were likewise made during the summer of 

 1907 for the special purpose of collecting algae. 



To what degree the earlier records have been confirmed or corrected by these sup- 

 plementary dredgings will appear from time to time in the special discussion relating 

 to particular species. It may be noted in passing, however, that the later operations 

 have added very materially to the accuracy of our results as a whole. 



A chart (no. 226) has been prepared indicating the position and, so far as possible, 

 the direction and extent (see p. 18) of the dredgings of the survey. Upon this chart 

 the stations are numbered, these numbers corresponding to those given in the lists. The 

 numbers employed are arranged consecutively according to date. They do not there- 

 fore bear any necessary relation to the position of the stations. In order to facilitate 

 the finding of a given station by the reader the following general statements are offered : 



(1) The Fish Hawk stations are all indicated by numbers of four digits, commenc- 

 ing with 7, thus: 7521, etc. The Phalarope and Blue Wing stations are indicated by 

 numbers ranging from 1 to 167. 



(2) Fish Hawk stations are designated either by a circle or by a chain of two, 

 three, or four smaller circles, connected by a straight or curved line (see p. 18). Phala- 

 rope and Blue Wing stations are designated by arrows, which show the direction of 

 the haul, and, very roughly, its relative duration. These last are in all cases near shore, 

 except for a few upon the Middle Ground shoal at the eastern end of Vineyard Sound. 



(3) Fish Hawk stations 7521 to 7602 are in Vineyard Sound, commencing near 

 Nobska Point and running to the westward. They are arranged at intervals of about 

 three-fourths of a mile along lines crossing the Sound at a distance of about 1 mile from 

 one another. Near the western end of Vineyard Sound three of these lines are num- 

 bered in a reversed order, i. e., stations 7581 to 7587 are along the line connecting Gay 

 Head and Cutty hunk, the next stations in serial order, being upon a line passing from 

 Nashawena to a point about 1 mile east of Gay Head. 



(4) Stations 7603 to 7609, inclusive, are at Crab Ledge (see chart 223), and are 

 therefore not included upon the present chart. 



(5) Stations 7610 to 7675 are in Buzzards Bay — 7610 to 7635 are in the upper 

 half, starting from a point near Woods Hole ; 7636 to 7675 are in the lower half. 



a Certain groups, however, did not receive adequate attention, and comparatively few of these specimens were referred to 

 specialists for identification. 



