CLASS CEPHALOPODA. Il 
at the bottom of the sac; arms shorter than the body, and 
loaded with cups for about half their length. 
L. media ; Sep.media; L. Rondel, 508. Fins forming an 
ellipsis at the bottom of the sac, which terminates in a sharp 
point. 
ONnYKIA, Lesueur. ONYCHOTHEUTHIS, Lichtenst. 
The long arms furnished with cups, terminating in hooks; 
in other respects the form is the same. 
SEPIOLA, Cuv. 
The rounded fins attached to the sides of the sac, and not 
to its point; one species. SS. vulgaris; S. sepiola; L. Ron- 
del, 519; inhabits European seas. The sac is short and 
obtuse, and the fins small and circular. It seldom exceeds 
three inches in length, and its horny lamina is as slender, and 
sharp as a stilet. 
CHONDROSEPIA, Leukard. SEPIOTHEUTES, Blainv., 
The whole margin of the sac, on each side, bordered with 
the fins, as in sepia; but the shell horny, as in loligo. 
SEPIA, Lam. 
The Sepiz, properly so called, have the two long arms of a 
loligo, and a fleshy fin extending along the whole length of 
each side of the sac. The shell is oval, thick, convex, and 
composed of numerous and parallel calcareous laminz, united 
by thousands of little hollow columns, running perpendicularly 
from one to the other. This structure, rendering it friable, 
causes it to be employed for polishing various kinds of work ; 
it is also given to birds in aviaries, for the purpose of whetting 
their beaks. 
The ink-pouch of the sepiz is detached from the liver, and 
situated more deeply in the abdomen. The glands of the 
