PLATE XXIV. 



Fig. A. Acanthonus armatus (page 117). 



Indo-Pacific Ocean; the specimen figured is from north of New Guinea, Station 218; 

 depth, 1070 fathoms, a, outer; a', inner aspect of first branchial arch. 



Fig. B. Porogadus rostratus (page 113). 



North of Celebes, Station 198 ; depth, 2150 fathoms. A magnified view of a scale is 

 added. 



