10 
BULLETIN OF THE BUREAU OF FISHERIES 
It is a pleasure to acknowledge afresh the assistance rendered by the following 
collaborators, who have undertaken the identification of different groups: W. F. 
Clapp, the pelagic mollusks of the cruises of 1912 to 1916; Dr. S. F. Clarke, 
Fig. 5. — Locations of Gram-pus stations 10340 to 10357, July 19 to 26; station 10398, August 29; and stations 10399 to 10404, 
October 31 to November 8, 1916 
floating hydroids, spring of 1913 (in Bigelow, 1914a, p. 415); Dr. C. O. Esterly, 
the copepods of 1912, 1913, and 1914 (in Bigelow, 1914, p. 115; 1914a, p. 409; 1915, 
p. 287; and 1917, p. 290); Dr. C. McLean Fraser, floating hydroids, summer of 
1913 (in Bigelow, 1915, p. 306) ; Dr. FI. J. Hansen, the euphausiids of 1912 and of 
