430 



DEPARTMET^'T OF THE NAVAL SERVICE 



' 'Acadia ' ' Concluded . 



Station No. 



Depth (metres). 



Depth of Haul (metres). 



Length (mm.). 



Number. 



74 



75 



76 



79 



85 



S7 



over 1 , 000 



over 1,000 



over 1,000 



360 



over 400 



over 400 



331 



325- 



55- 



c. 20- 



325- 



55- 



c. 20- 



270- 



c. 20- 



325- 



55- 



270- 



55- 



c. 20- 



270- 



55- 



c. 20- 



290- 



55- 



c. 20- 



(V. 



(V. 



10 (T. 



(V. 



(V. 



10 (T. 



(V. 



10 (T. 



(V. 



(V. 



(V. 



(V. 



10 (T. 



(V. 



(V. 



10 (T. 



(V. 



(V. 



10 (T, 



10-16 



15-24 



13-36 



12-40 



10-16 



15-17 



15 & 23 



Vertical. — Except in three instances, this species was obtained only in hauls 

 taken from a depth of 200 metres or more. The exceptions are small individuals, 

 25 m m.or less in length, and were obtained at Acadia stations 48, 54 and 72. The 

 conditions at these stations were peculiar. The surface oceanic species S. serratoden- 

 tata, the coastal species S. elegans, and two deep-water boreal species, the present one 

 and Eukrohnia hamata, all occurred together. These are undoubtedly places where 

 mixing of the different kinds of water occurs and where vertical currents might be 

 expected to bring temporarily nearer to the surface forms that are ordinarily to be 

 found only in deeper water. The number of individuals in each case was small (1, 

 2,1). 



On the first cruise of the Acadia, numerous specimens were obtained in all the 

 hauls made from 200 metres to the surface (stations 14, 16 and 17) outside the con- 

 tinental edge and none in the hauls made from 100 metres to the surface (stations 12, 

 15, 26 and 27). On the second cruise (with the exceptions noted above) again only the 

 deeper hauls were productive. The shallower hauls were not very deep (90 metres or 

 less). At station 56, three individuals were obtained in the closing net from below 250 

 metres. These facts show an ordinary distribution of this species in our waters from 

 above 200 metres (but not above 100) to below 250 metres. Michael (1913, p. 32) 

 gives for *S'. lyr-a (in which he includes 8. maxima) a maximrun abundance below 250 

 fathoms and a decreasing frequency toward the surface (above 25 fathoms it was 



