CANADIAN FISHERIES EXPEDITION, lOl-'flo 



425 



boreal oceanic water. As it belongs typically to lower latitudes, its absence may mean 

 that older individuals when carried toward the poles survive, but do not have any 

 progeny (owing to the absence of the warm salt surface water frequented by the young) 

 and as a result the cold water that passes toward low latitudes is devoid of this species, 

 the old individuals having all died off. 



There is, however, some doubt as to how far it is carried toward the poles. Ritter- 

 Zahony considers that Fowler's Antarctic specimens belong to S. gazellae and not to this 

 species, and he gives the usual distribution as between the fortieth parallels north and 

 south. 



(b) Sagitta enflata Grassi. 



1911. Ritter-Zahony, p. 16. 



The range in size of the specimens obtained is from 7-23mm. The larger indi- 

 viduals were all sexually mature. This species is easily recognized by the short tail and 

 the short sausage-shaped ovaries. 



DISTRIBUTION. 



C. G. S. "AcADu." 



Station 

 No. 



Hour. 



41 



42 



44 



.50 



56 



75 



6 a.m. 



9 a.m. 

 3 p.m. 

 9 p.m. 



3 p.m. 

 9 p.m. 



Depth 

 (metres). 



360 



over 1,000 



over 1,000 



151 



over 1 , 000 



over 1,000 



Depth of Haul (metres). Length (mm.). | Number. 



200- (V.). 



100- (V.). 



(T.). 



200- (V.). 



(,T.). 



270- (V.). 



(T.). 



145-55 (C). 



145- (V.). 



55- (V.). 



(T.). 



375-250 (C). 



250- (V.). 



.325- (V.). 



55- (V.). 



c. 20- 10 (T.). 



11 



7-23 



7-20 



IS 



(fragment) 



13 

 6-13 





 

 1 

 2 

 

 39 

 170 

 

 1 

 

 



1 







I 



4 

 



Vertical. — All the specimens obtained came from open-net vertical hauls or from 

 horizontal surface hauls. This species is a typical "surface form belonging to the upper 

 epiplankton. The majority of the specimens were taken in a surface haul at 3 p.m. 



horizontal. 



Horizontal. — Sagitta enflata is a troi)ical form ranging north to the fortieth parallel. 

 The present records appear to be more northern than any hitherto recorded for this species. 

 Two specimens were obtained at Acadia station 75, the position of which was 43° 30' N.. 



