FISHES. 495 



exists any constant mark of distinction which can lead us to 

 suppose they are two distinct species. 



Gen. Gunellus, Cuv. 



Body very long and compressed, smooth and slippery ; 

 head small; nose sharp; dorsal fin long, with all the rays 

 sharp and single ; tail free ; pectorals consist of one spike, 

 and one weak ray, joined together ; teeth in several rows ; 

 height of the body equal to one-ninth of the. length. 



42. GUNELLUS VULGAEIS, Cuv. Svart Flackig Tejstefisk. 



The Spotted Gunnel. D. 



Distinguished by the ten round black spots along 

 the top of the back, each encircled with a white ring ; 

 the Scandinavian specimens rarely exceed 8 in. 

 These fish derive their Swedish name from the fact 

 of their affording food to the black guillemot, called in 

 Swedish "tjesto." 



Is met with along all the Scandinavian coasts, from the 

 Sound at least up to Tromsoe, near the North Cape; 

 common in West Finland; spawns in November; colour 

 brown-yellow.- D. 78 ; A. 2,42; P. 12; V. 1,1; C. 18. 



Gen. Zoarcceus, Cuv. 



Body slimy; both the anal and dorsal fins are joined on 

 to the tail; ventrals before the pectorals. 



43. ZOAECJEUS VIVIPAEUS, Cuv. Tang Lake. The Vivipa- 

 rous Blenny. D. F. 



In shape much resembles the burbot, whence its 

 Swedish name of tang lake. 



Is met with pretty commonly on every Scandinavian 

 coast; length from 12 in. to 16 in. ; brings forth living 

 young at no one particular season of the year, probably 

 dependent upon the age of the fish; body colour yellow- 

 brown, with black spots on the sides, and yellow anal 

 fin; D. 100; A. 70; P. 19; Y. 3. 



Gen. Anarrhichas, L. 



Body slimy, deep in front, with protruding abdomen 

 tapering very much to the tail; head blunt, rounded; 



