DESCRIPTION OF FIGURES ON PLATE IV. 



Fig. 1. Larva of Trachmus vipera of 6 m.M. length, from a preserved 



specimen, pelagic, 30 Juli 1903, North sea (Haaks grounds), taken with a 



surface to w-net. '^/j. 

 Fig. 2. Trachinus vipera of 13 m.M. lengtli, from a preserved specimen, 



pelagic, 30 Juli 1903. North sea (Haaks grounds), taken with a surface 



tow-net, pector. 14, anal 23, fir.st dorsal 4, second dorsal 24. •'/j. 

 Fig. 3. Postlarval Trachinus vipera of 9,5 m.M. length , seen from above, 



from a preserved specimen, ^/j. 

 Fig. 4. Larva of Trachinus draco, of 4 m.M. length, from a preserved 



specimen, taken with a »Scherbrutnetz" at a depth of 20 M. at Station 



H. IX (near Hoek of Holland) August 1904. 22/,. 

 Fig. 5. Larva of Trachinus draco of 4,3 M. length, from a preserved 



specimen, taken with a vScherbrutnetz" at a depth of 20 M. at Station 



H. IX. Augu.st 1904. 22/,. 

 Fig. 6. Larva of Trachinus draco of 7,5 m.M. length, from a preserved 



specimen, taken at the same spot as the foregoing larvae. ^^/i. 

 Fig. 7. Postlarval Trachinus draco of 16 m.M. length, from a preserved 



specimen, taken with a »Scherbrutnetz" at a depth of lOM. at the Brown 



Ridges (E. side) Sept. '04 pectoral 15, anal 31, fust dorsal 6, .second dorsal 



30, caudal 15. «/i. 



