282 
BULLETIN OF THE BUREAU OF FISHERIES 
Cruise 
IV. January 27-February 1, 1916. (Outside of Capes Henry and Charles) (on U. S. S. Roosevelt.) 
Stations 8442 to 8457. 
V. March 6-12, 1916, stations 8458 to 8496. 
VI. April 21-26, 1916, stations 8497 to 8535. 
VII. May 22-30, 1916 (for hydroids), stations 8536 to 8549. 
VIII. June 2-12, 1916, stations 8550 to 8588. 
IX. July 17-31, 1916, stations 8589 to 8627; 24-hour station 8617. 
X. August 30-September 2, 1916 (for hydroids), stations 8628 to 8650. 
XI. September 8-12, 1916, stations 8651 to 8686. 
XII. December 16-17, 1916 (for hydroids), stations 8687 to 8696. 
Xlla. March 20-22, 1917, (for hydroids), stations 8697 to 8706. 
XIII. January 10-16, 1920, stations 8707 to 8737. 
XIV. March 6-12, 1920, stations 8738 to 8769; 24-hour stations 8738 and 8760. 
XV. May 1-8, 1920, stations 8771 to 8799. 
XVI. July 3-9, 1920, stations 8800 to 8831; 24-hour stations 8800 and 8811. 
XVII. August 21-26, 1920, stations 8832 to 8866; 24-hour stations 8855 and 8866 (8832 to 8836 
outside of bay). 
XVIII. October 15-21, 1920, stations 8867 to 8896; 24-hour stations 8867 and 8877. 
XIX. December 4-10, 1920, stations 8897 to 8928; 24-hour stations 8918 and 8928. 
XX. January 22-27, 1921, stations 8929 to 8959; 24-hour stations 8948 and 8959. 
XXI. March 28-April 2, 1921, stations 8960 to 8988; 24-hour stations 8960 and 8970. 
XXII. May 30-June 3, 1921, stations 8989 to 9019; 24-hour stations 9008 and 9019. 
XXIII. January 21-25, 1922, stations 9020 to 9047; 24-hour station 9039. 
XXIV. March 25-30, 1922, stations 9048 to 9078; 24-hour stations 9067 and 9078. 
The general cruises were made at approximately equal intervals, and on each 
cruise about 30 “areas” or regions were visited; and, for the most part, the same 
areas were visited on each cruise. These areas, which were circular in outline, were 
charted as 183 meters (200 yards) in diameter, and their positions were selected in 
such a way as to make lines across the bay covering all localities of interest from Cape 
Charles and Cape Henry to Swan Point and North Point. Each area was designated 
by a capital letter, as may be seen in Figure 1. While they were recorded as meas- 
uring 183 meters in diameter, the actual stations made were not spread out much 
within the area during the time the writer was in charge; that is, the various stations 
within the area were made according to bearings which were kept the same, usually, 
from cruise to cruise, so that the positions of the various stations in an area did not 
vary a great deal. 
Water samples for quantitative plankton study and for ascertaining the salinity 
and temperature of the water were collected, using the Green-Bigelow water bottle 
and the Negretti-Zambra reversing therometer. About half of each sample of water 
(approximatley 500 cubic centimeters) was run into a special type of storage bottle 
with a patent stopper and rubber washer. The collection of these samples was then 
made a matter of record in the log, and later the samples were shipped to the United 
States Geological Survey, where, under the supervision of Dr. R. C. Wells, their 
salinity was determined by titra tion for chlorine. From the salinity data the densities 
were calculated. 
The other half of the contents of the water bottle was used as a plankton sample. 
Such samples were later sent to Dr. Bert Cunningham, of Duke University, Durham, 
N. C., who determined the species, counted the number of organisms per cubic centime- 
ter for each species, and studied the distribution of the species in the bay. These 
samples gave a fairly good idea of the abundance of most plankton organisms with the 
exception of copepods and some other of the more active species. While the observa- 
tions and collections described above were being made the ship was allowed to drift 
