CEPHALOPODA. 309 



the will of the animal. The receptacle of the ink is seated in the 

 liver J the glands of the oviducts are small. Some of them 



Polypus, Aristotle, 



Have two alternate rows of cups along each foot. 



The common species, Sepia octopodia, Lin., with a slightly 

 rough skin, arms six times the length of its body, and fur- 

 nished with one hundred and twenty pairs of cups, infests the 

 coast of Europe in summer and destroys immense numbers of 

 Fishes and Crustacea. 



The seas of hot climates produce another, Sepia rugosa, 

 Bosc; Seb., Ill, ii, 2, 3, whose body is rougher; arms some- 

 what longer than the body, and furnished with ninety pairs of 

 cups. It is from this species that some authors suppose the 

 Indian Ink is procured. Others again, 



Eledon, Aristotle, 



Have but a single row of cups along each foot. 



One of them, the Poidpe musque, Lam., Mem. de la Soc. 

 d'Hist. Nat. 4to, pi. ii; Rondelet, 516(1), is found in the Me- 

 diterranean, which is remarkable for its musky odour. 



Argonauta, Lin. 



Octopi with two rows of cups, the pair of feet which are nearest 

 10 the back being dilated at the extremity into a broad membrane. 

 The two cartilaginous granules of the common Octopus are want- 

 ing, but these MoUusca are always found in a very thin shell, sym- 

 metrically fluted and spirally convoluted, the last whorl so large 

 that it bears some resemblance to a galley of which the spine is 

 the poop. The animal makes a consequent use of it, and in calm 

 weather whole fleets of them may be observed navigating the sur- 

 face of the ocean, employing six of their tentacula as oars, and 

 elevating the two membranous ones by way of a sail. If the sea 

 becomes rough, or they perceive any danger, the Argonaut with- 

 draws all its arms, concentrates itself in its shell, and descends to 

 the bottom. The body of the animal does not penetrate to the 

 bottom of the spires of the shell, and it appears that it does not ad- 

 here to it, at least, there is no muscular attachment, a circumstance 

 which has induced some authors to believe, that its residence there 



(1) Add the Poulpe cirrheux. Lam., loc. cit., pi. i, f. 2, and, in general, several 

 new species of the whole genus Sepia, which will shortly be published by M. de 



F^russac. 



