THE SEPIA. 



275 



than fifty were gathered, but even bolted right over the entire 

 breadth of the vessel, like a sportsman over a five-barred gate. 

 Finally, the fin-like expansion of their mantle renders the 

 nimble decapods good service in swimming. In the Sepias this 



Sepia. 



b. Finny membrane running along the sides of the body. <.-. Arms with four row's 

 of suckers. d. Elongated retractile tentacles. e. Eyes. 



finny membrane runs along the sides of the body, while in the 

 Calamary it forms a kind of terminal paddle. 



It might be supposed that the dibranchiate cephalopods, by 

 their swiftness, their arms, and their powerful jaws, were suffi- 

 ciently provided with means of attack or defence ; but it must 



