426 FISHES. 



"Huss," or "Lesser Spotted Dog-fish," and one mentioned 



by Day and since verified by myself on many occasions, is 



that when first caught and placed in the basket 



Hound with pollack and other fish, its touch dis- 



or Bow colours the latter, the points of contact being 



indicated by white patches. It is somewhat 



commoner on our coasts than the last, preferring deeper 



water. A smaller species, it rarely exceeds a length of 



3^2 feet. In colour and markings, however, it strongly 



resembles the last, the spots being smaller, less blurred, 



and more numerous. It is oviparous, depositing its 



" purses " in autumn. 



The Black-mouthed Dog-fish is not common in British 

 seas, where it grows to a length of 3 or 4 feet. In colour 

 Black- ** * s S re yi s h> having three rows of black 

 mouthed white-edged spots along the sides. The snout 

 Dog-fish. j s pointed, and secretes a viscid matter ; the 

 tail has serrated processes ; the skin is very rough through- 

 out. The inside of the mouth, which has a fold of skin, 

 is black. The eye is large, and there are spiracles. This 

 shark deposits "purses" devoid of the usual filaments. 

 Mr Dunn of Mevagissey, a most accurate observer of sea- 

 fish, has remarked on the presence of curious reticulated 

 organs above and below the snout of this .species. 



[Centrina salviani, a Mediterranean form, has been 

 trawled on one occasion at least off the Cornish coast. It 

 grows to a length of nearly 6 feet. The eye is .large and 

 without nictitant membrane, and over it is a distinct 

 ridge. The spiracle is large, the gill - openings narrow, 

 and the mouth small. In colour this dog-fish is uniform 

 dark brown.] 



One of the commonest of our smaller members of the 

 shark tribe is the Spur-dog or Picked Dog, a gregarious, 

 fish-eating species, found on every part of the British and 



