PLATE LVIII. 



Fig. A. Platytroctes apus (page 229). 

 Mid Atlantic, Station 107; depth, 1500 fathoms. 



Fig. B. Bathytroctes rostratus (page 227). 

 Off Pernambuco, Station 120; depth, 67.5 fathoms. With enlarged view of scale. 



Fig. C. Xenodermichthys nochilosus (page 230). 



South of Yedo, Station 232 ; depth, 345 fathoms, c, a piece of the skin, slightly 

 magnified, with four luminous nodules. 



