70 



FISH GALLERY. 



[Case 13.] carnivorous littoral fishes, many of which have become accli- 

 matized in fresh water. It is represented in British waters by 

 several species of Gobius and two of Callionymus (Dragonet). 

 The latter family contains the Lump-suckers (Cyclopterus), the 



Fig. 54. 



Luinp-sucker (Cyclopierus lumpus} ; with a separate view of the 

 sucking-disk. 



common species (C. lumpus] occurring in North Europe and 

 North America. It is difficult to remove it from any object to 

 which it has once attached itself by means of its sucking-disk. 



The Pediculati or Sea-devils (Case 13) contain a larger number 

 of bizarre forms than any other; and there is, perhaps, none in 



