CEPHALOPODA 
449 
hoop developed into a long, curved, sharp-pointed claw, and these 
Weapons clustered at the expanded terminations of the tentacles, and 
arranged in a double alternate series along the internal surface of the 
eight muscular feet, and he will have some idea of the formidable 
nature of the carnivorous cephalopod.” The professor notices another 
structure which adds greatly to the prehensile powers of the uncinated 
Cephalopods. “ At the extremities of the long tentacles a cluster of 
small, simple, unarmed suckers may be observed at the base of the 
e Xpanded part. When these latter suckers are applied to one another, 
the tentacles are firmly locked together at that part, and the united 
strength of both the elongated peduncles can be applied to drag 
towards the mouth any resisting object which has been grappled by 
the terminal hooks. There is no mechanical contrivance which sur- 
passes this structure ; art has remotely imitated it in the fabrication of 
the obstetrical forceps, in which either blade can be used separately, 
° 1 ’, by the interlocking of a temporary blade, be made to act in com- 
bination.” — Cye. of Anat. 
Family of the Sepiada;. 
The body of the cuttle-fish (Sepia) is thus a very singular structure, 
Somewhat reminding us of certain species of polypes. We find a body 
°r abdominal mass, and a head, separated by compression, sufficiently 
Marked. The body is covered by the mantle, which has the form of 
a sac opened only in front by a transverse cleft. The head has a 
P l 'ojecting and well-developed eye on each side ; it is surmounted by a 
®°rt of fleshy funnel, which is divided by four pairs of tentacles. At 
^he bottom of this tentacular funnel is the mouth ; and from the an- 
terior opening in the mantle a tube issues, which is wide at its base. 
If we study the general aspect of the animal more closely, we find 
*hat the tentacles — which serve at once as organs of locomotion for 
dimming, for creeping, and as prehensile organs for seizing and 
staining its prey — are conical, very long, and all of the same form. 
® a eh of them has towards its axis a longitudinal canal, which encloses 
a great nerve, winch is also surrounded with muscular fibres, arranged 
ltl rays. The suckers, already described, occupy all the internal sur- 
of the eight tentacular arms, which are arranged in two rows, 
having the form very nearly of a semi-spherical capsule. Of these 
2 G 
