Ill 
THE CUTTLE-FISH. 
BY ST. GEOKGE MIVAKT, E.Z.S. 
Lecturer on Comparative Anatomy at St. Mary’s Hospital. 
[PLATE XLI.] 
I N the number of the Popular Science Keyiew of October 
last, we gave a short account of the structure of the Lobster, 
to serve as a type of one of the great primary groups into 
which the animal kingdom is divided. We now select another 
animal of an altogether different build to serve as a type of 
another great primary group. 
The Cuttle-fish is really no fish at all, as we shall soon see, 
and is almost, if not quite, as unlike a true fish as we have 
already seen the lobster to be. 
Its appearance is unprepossessing enough — a short swollen 
body (all soft externally — not shelly, as in the lobster), with a 
considerable head, from the crown of which radiate ten long 
arms, give it a fanciful resemblance to a great marine spider ; 
not that there is any real affinity between the two, the spider 
being formed on the same type of structure as is the lobster. 
The head (which is sometimes called the prosoma^ or front 
body) contains the organs of sense, and the mouth opens in the 
middle of its upper surface, in the midst of the radiating arms. 
The body, or abdomen (sometimes called metasoma, or hind 
body), is a great bag enclosing the circulating, digestive, and 
generative organs. This body is enclosed in a great fieshy 
envelope, which is called the mantle (or pallium), and which is 
firmly adherent to the body behind, but free in the front — like 
a smockfrock sewn down the back to the waistcoat beneath 
it, but quite unattached at the chest, where a space is left 
between the body and its investing garment. This space is 
called the pallial chamber; in it are placed the gills, and 
into it the intestine and certain ducts open. 
On each side of the body the mantle is, as it were, pulled out 
into a sort of fin (fig. 1 1). On the front surface of the body 
a sort of pipe (termed the funnel) is placed, which is open at 
VOL. VIII.— NO. XXXI. I 
