1 88 



DISCOVERY REPORTS 



TYF. This net is the Petersen young-fish trawl, similar to that modified and de- 

 scribed in full by Clark^ as his type A. At first it was used in the normal manner with 



* Brass rods were substituted when used vertically, 



■f- The letters refer to Fig. 6, p. 181. 



J Measured from knot to knot. 



§ Widths latterly adopted. 



11 Measured from knot to knot unless otherwise stated. 



^f With transverse ropes also in N 200 and N 450. 



** A specially flexible rope of tarred hemp. 



poles and otter boards as a pelagic trawl, when it had a rectangular opening 6 ft. by 

 4 ft.; but later, after July 1926, the boards were discarded and the net, mounted upon 

 the N 200 frame, used as an ordinary tow-net. In this form, as used by Russell^ and 



1 Clark, R. S., Journ. Marine Biol. Assoc, n.s., xii, p. 163, 1920. 



2 Russell, F. S., ibid, xiii, no. 4, 1925. 



