BIGELOW: COAST WATER EXPLORATION OF 1913. 



275 



the copepod Metridia longa, which is more typically arctic than any 

 of the preceding, is recorded from the Gulf for the first time. North- 

 ern species, however, were not uniformly more abundant than in 1912, 

 the reverse being true of Clione limacina (p. 305). 



Distribution of Salpa and Doliolum. 



Identified by W. F. Clapp. 



Table of occurrence. 



Judging from the general distribution of the various species of Salpa 

 in northern waters (Apstein, 1909) their occurrence in numbers was 



