(54) 



CLASS [. CEPHALOPODA . 



GENERA. 



A. No exterior shell. 



1. Octopus. Lam. (Poly- 

 pus of the Ancients.) 

 (1). PL 14, fig. 11. 



Bag oval, without fins. 



8 Feet, very large in §g 2 Small conical horny 



proportion to the body, grains on each side of 



and united by a mem- the back, 

 brane at their base. 



2. Loligo. Lam. 



Bag with two fins to- 8 Feet with little A horny plate within 

 wards the point. PL 14, suckers (or short pedi- the back, 

 fig. 1, 10. cles), and two arms to 



the head, much longer 

 than the feet, with suck- 

 ers at the end only (2) . 



3. Sepia. (3) Lam. 



A fleshy fin along each Ditto, 

 side of the bag. 



B. Shells interior • chambered. 



4. Spirula. Lam. 

 Ditto. PL 14, fig. 3. 



Shell oval, thick, gib- 

 bous. 



5. Nautilus. 

 Ditto. 



\ 



Mouth with several A ligament from the 

 circles of numerous back passing through- 

 small . tentacula without out the syphon, and at- 

 suckers. taching the animal. (4) 



(1) The reservoir for the ink is enchased in the liver. Some believe that the 

 Sepia rugosa is the species which furnishes the Indian ink. The Mediterranean 

 produces a species remarkable for its musky odour. 



(2) They make use of these as anchors. 



(3) They lay their eggs attached to one another like bunches of grapes, which 

 has given rise to the vulgar name of Sea-grapes. 



(4) According to Rumphius ; who says that the animal of the Nautilus Pompilius 

 is partly lodged in the last chamber of the shell, and has the bag, eyes, parrot-beak j 

 and funnel of the other Cephalopoda. It is also probable that the epidermis is 

 prolonged on the exterior of the shell. 



