PLATE LIII. 



Fig. A. Opostomias micripnus (page 208). 

 South of Australia, Station 159 ; depth, 2150 fathoms. 



Fig. B. Echiostoma barbatum (page 206). 

 Madeira. 



Fig. C. Fachystomias microdon (page 210). 

 North-west of Austraha, Station 181 ; depth, 2440 fathoms. 



