CHARACTERISTIC DEEP-SEA TYPES. 



FISHES. 



25 



The flat fishes are represented by at least two genera fossil 

 in the schists of Glaris, believed to have been the bottom of a 

 deep sea, and in the clays of Sheppey are found fossil the three 

 genera Gadus, Merlucius, and Pliycis, — types which rarely go 

 below 1,000 fathoms. Of the eleven recognized families of 

 anacanthian lishes (flat fishes, cods, and the like), all save four 

 are known from the abyssal fauna. The brotulid forms allied 

 to the cods represent a dominant abyssal group. 



Among them may be mentioned Barathronus (Fig. 198) 



,^'»s^.^5^>rs= 



Fig-. 11 IS. — Barathronus bicolor. About 4. 



(1769 fathoms), a small-eyed fish with marked colored bands upon 

 its flanks, and Barathrodemus (Fig. 199) (647-1395 fathoms), a 



'•""*«*=».■>- 



:ZZS3 



-v . , ..V .-» - , ( i jict ' itEoiiei 



Fig-. IDU. — Barathrodemus manatinus. About 1^. 



cusk-like fish. One of the most interesting forms of the Bro- 

 tulidae is Aphyonus, with rudimentary eyes, one species of which, 



.y^" 



f^rSSs^-, 



Fig^. 200. — Aphyonus mollis. About \. 



having no visible eyes, was obtained by the " Challenger " at 

 a depth of 1,400 fathoms, south of New Guinea ; another, A. 

 mollis (Fig. 200), by the " Blake," in 955 fathoms. This fish 



