20 



THE BUTTERFLY AND THE BUTTEK FISH. 



residence under a rock or stone, whence it rarely 

 wanders far. Like others of the genus, it varies much 

 in colour according to the ground it occupies. 



BUTTERFLY FISH. 



The other species are Montagu's Blenny ; the Ocel- 

 lated Blenny; the Butterfly Fish, so called from the 

 singular appearance of its spotted dorsal fin ; the 

 Gattoruginous Blenny, not uncommon in Cornwall, 

 ^vhereitis taken in crab-pots, and called by the Cornish 

 urchins Tompot ; and the Crested Blenny, which has on 

 the head a small crest, which the fish can erect and 

 d^^press at pleasure. 



BUTTER GUNNEL {Bleiinius gunellus). 



The Spotted Gunnel (German : Der Butterfisch), also 

 called the Butter-fish — from the slimy secretion which 

 covers its sides — is a common small fish on our coast, 

 of similar habits to those already described. 



