ANCISTROTEUTHIS. 33 



Shell lanceolate, pennate, sides thin. 



Ex. O. Banksii, Leach, pi. 3, fig. 4. Shell, O. Bauksii, 

 fig. 4, a. 



A remarkable mechanical contrivance exists in the Owy- 

 clioteuthis, one of the most formidable of Cephalopods. At 

 the extremities of the long tentacular arms, besides the hook- 

 armed cups, there is a cluster of simple unarmed suckers 

 at the base of the expanded part. " When these latter 

 suckers," says Owen, " are applied to one another, the ten- 

 tacles are firmly locked together at that part, and the uni- 

 ted strength of both the elongated peduncles can be applied 

 to drag towards the mouth any resisting object that has 

 been grappled by the terminal hooks." 



Sx>ecies of Onychoteuthis. 



Banksii, Leach. Bartlingii, Lesueur. 



Kamtschatica, Midd. 



Grenus ANCISTROTEUTHIS, Gray. 



Tentacular arms with hooks. Sessile arms with cups 

 and rings. Club of tentacular arms with hooks only. 



Shell narrow, rather dilated in front, with one central 

 and two marginal ribs. 



Ex. A. Lichtensteinii, Ferussac, pi. 8, fig. 5. Shell, 

 A. Lichtensteinii, fig. 5, a. 



Three species of this genus are known ; one, with the 

 body shagreened, from the Indian Ocean. The shell is 

 horny, linear, very narrow, gradually widening towards the 

 fore part, the sides are thickened on the edge, and the apex 

 is long, conical, horny, and obliquely produced. 



