MUGILIFORMES 



423 



Fig. 426. 

 Osphrotnewis olfur, Comni. (After Giinther.) 



Schrn. — E. Indies. Micracanthus, Sauv. ; Africa. LiiciocepJialns, Blk. ; 

 Polyacanthus, K. and H. 



Tribe 4. 



Family Chiasmodontidae. Of very doubtful relationship are these 

 voracious deep-sea fish. The skeleton resembles that of the Atherinidae, 

 but the operculum is reduced. The scales are small or absent. 



Chiasmodon, Johns. ; Pseudoscopelus, Gthr. ; Champsodon, Gthr. 



Chiasmodon niger, Johns. ; obtained in the North Atlantic at a depth of 1500 fathoms 

 the specimen has swallowed a large Scopelus (s) ; o, pelvic tin. (After Giinther.) 



Tribe 5. 



Family Stephanoberycidae. The affinities of this family are yet 

 more uncertain. The pneumatic duct remains open ; the median fins 

 are spineless ; the pelvic fins are abdominal, and provided with 1 spine 



