BIGELOW: EXPLORATIONS OF THE COAST WATERS. 



297 



But in the Gulf of Maine S. clcgans plays that role, except locally, in 

 its eastern side (Fig. 89). 



These facts support the general thesis that while S. elegans is 

 endemic in the boreal waters of the Gulf, S. serratodentata, a more 

 southern species, is carried thither and to Nova Scotian waters by the 

 current from the southwest. 



Six more species of chaetognaths have so far been detected in the 

 collections of 1914 and 1915. Sagitfa lyra occurred sparingly in the 

 deep hauls in the Gulf and Eastern Channel in 1914 (Stations 10225, 



Fig. 90. — Grampus records for Sagilta serratodentata, 1912-1915. C records for 

 May-July 15; X.July 15; ....February; , western limit, May to August. 



225-0 M; 10227, 180-0 M; 10248, 150-0 M; 10254, 225-0 jVI; in 

 1914: Station 10310, 100-0 M; in 1915), and at most of the stations 

 over the continental slope (Stations 10220, 10233, 10261, 10295) in 

 hauls at 400-500 meters. But it was lacking in all shallow hauls 

 even at these same stations. Sagitta hexaptcra has been detected in 

 one haul only (Station 10245, 100-0 meters, one specimen). 



The warm water S. cnflata, which is common south of New York 



