MUGIL1FORMES 



423 



FIG. 426. 

 OspTiromenits olfax, Comm. (After Giinther.) 



Schrn. E. Indies. Micracanthus, Sauv. ; Africa. Luciocephalus, 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. 



FIG. 427. 



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

 the specimen has swallowed a large tieopelus (s) ; o, pelvic fin. (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 



