400 SUUAl.lD.E. 



CHONDIiOPrERVGU. SQUALWjE. 



THE PICKED DOG-FISH. 



BONE-DOG, Sussex. — HOE, Orkney/. 



Spinax acanthias, L'aiguillat, Cuvier, Regne An. t. ii. p. 391. 



Galeus ,, sive spinax, Willughby, p. 56, B. 5, f. I. 



Squalus ,, LiNNaius. Bloch, pt. iii. pi. 85 ; the young, pt. iii. pi. 75, 



fig. 1. 



,, spinax, Picked Shark, Penn. Brit. Zool. vol. iii. p. 133. 



,, acanthias, ,, ,, Don. Brit. Fish. pi. 82. 

 Spinax ,, Common Dog-fish, Flem. Brit. An. p. 166, sp, 10. 

 Squalus ,, Picked Dog-fish, Jenyns, Man. Brit. Vert. p. 505, sp. 194. 



Generic Characters. — Two dorsal fins, with a strong spine at the anterior 

 edge of each ; no anal fin ; temporal orifices present ; teeth in several rows, 

 small and cutting. 



The Picked Dog-Fish is a very common species, at 

 once distinguished from tlie other British Sharks by the sin- 

 gle spine placed in advance of each of its two dorsal fins, — 

 a weapon from which it derives its specific appellation, pick 

 being synonymous with pike or spike. Among the Scotch 

 islands, where it is called the Hoe, it appears most numer- 

 ous at the full and change of the moon, on account of the 

 then greater quantity of water, and consequent increased 

 strength or race of the tide in some of the narrow straits. 



