PLATE LIII. 



Fig. A. Opostoniias micriimtis (page 208). 

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



Fig. B. Echiostoma harhatuni (page 206). 

 Madeii-a. 



Fig. C. Fachystomias microdon (page 210). 

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



