126 DE. G. H. rOWLEE — BISCATAN PLANKTON : 



table (p. 120) nor the table of average specimens per liour haul immediately following 

 shows it so obviously as in the other case. 



4.0 A.M. t o 7.0 P.M. 7.0 P.M. t o 4.0 a.m. 



Pepth in Average specimens Average specimens 



fathoms. Number of hauls. per hour haul. Number of hauls. per hour haul. 



9 7 05 



25 6 0-1* 6 3-6 



50 8 0-7* 4t 18-5t 



75 3 10* 8 8-0 



100 13 0-4 9 7-5 



The most that one dare say is, that the species was less commonly caught in daylight 

 than at night. 



Stylocheiron Suhmii. 



The table below shows that, while the sj)ecies occurred in every haul at 50, 75, and 

 100 fathoms, the expectation of specimens was highest at 50 and 75 fathoms. 



\ 



CD 



3 



o 





TO 

 TO 

 B 



5. TO 



a 3 



0-5 



2-4 

 21-5 

 22-6 

 13-9 



1 A, 3 L 



1 A 



1'5 A, 1 L 



1 A, 1 L 



A 6 L 



1 A 







1 L 



\ 





TO 



13 



TO 



TO rji 



5 o 2- 2 

 E- ^ 5 p 



• Hft TO aq 



C 3 TO 



The evidence of this table appears to point to this species having been epiplanktonic. 

 In the open serial nets, I have shown adults (a) and larvae (l), because, as will be seen 

 from the next table, the expectation of larvse diminishes with depth ; and if these larvae 

 be subtracted as possibly dead and sinking, the remaining adults are not more than 

 might be expected to be caj)tured in the upward passage of an ojjen net through densely 

 populated strata. A few specimens may have penetrated beyond the 100-fathom 

 horizon, but the centre of distribution was doubtless the lower epiplankton between 

 50 and 100 fathoms. 



Omitting the surface hauls, which contained only eight (4 A and 4 l) specimens in all, 

 captured iu two out of sixteen hauls, and are therefore too few to carry any weight in 



* Bright daylight, aetinometric standard reading 3"-6". 



t If 31 6 were included, .5 hauls at night would yield 32-8 average specimens. 



