10 CLASS CEPHALOPODA. 
Several species are known, closely resembling each other, 
both in the animal and the shell, which were united by Lin- 
neeus under the name of Argonauta argo, or the paper nau- 
tilus. 
BELLEROPHON, Montf. 
Certain fossil shells, so called, the animal of which is sup- 
posed to have been analagous to the argonauts. They are 
spirally and symmetrically convoluted, without septa, but 
thick, and not fluted ; the last whorl proportionably shorter. 
Lo1ico, Lam. 
An ensiform lamina of horn in the back, in lieu of a shell; 
the sac has two fins, and besides the eight feet promiscuously 
loaded with little cups on short pedicles, the head is furnished 
with two much longer arms, provided with cups near the end 
only, which is widened. ‘The animal uses these latter to keep 
itself immoveable, as if at anchor. The receptacle of the 
colouring matter is lodged in the liver, and the glands of the 
oviducts are very large. The eggs are deposited closely 
together in narrow garlands, and in two rows. 
They are now sub-divided according to the number and 
armature of the feet, and the form of the fins. 
LoLicopsis, Lam., 
Or the Calmarets, should have but eight feet, as in Octopus. 
They are only known, however, by drawings of but little 
authority. 
In the true loligo the long arms are furnished with cups 
like the other tentacula, and the fins are placed near the point 
of the sac. ‘Three species are found in the European seas. 
LL. vulgaris; Sepia loligo; L. Rondel, 506; Salv. 169. 
Fins forming a rhomb at the bottom of the sac. 
L. Sagittata, Lam.; Seb. III.iv. Fins forming a triangle 
