BLAINVILLE'S PIKED DOG-FISH. 

 Spinaoc Blainvillii^ BONAPARTE. 

 PLATE XVIII. 



Acanthias Blainvillii, Risso Spinax Blainvillii, Spinorol 



comune, Bonap. Icongrophia della Fauna Italica. 



A NATIVE of the Italian shores, confounded with 

 the Linnsean S. acanthias, and distinguished from 

 it chiefly by the relative proportion of its different 

 parts. It seldom exceeds two feet in length. 



In a few genera of osseous fishes we have spines 

 inserted into various parts, very frequently just 

 before the junction of the tail with the body; in 

 some they are several in number, in others they are 

 single only. The genus Acanthurus is so named 

 from the presence of three such spines j and in the 

 beautiful 



