10 MOLLUSCA. 



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

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

 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, 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 Poulpe musque, Lam., Mem. de la Soc. 

 d'Hist. Nat. 4to, pi. ii; Rondelet, 515*, is found in the Mediter- 

 ranean, which is remarkable for its musky odour. 



ARGONAUTA, Lin. 



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

 are nearest to the back being dilated at the extremity into a 



Third Division. Cephalopodes-sepiares. Pulpy Animals. 



o shell either exter- 

 nal or internal ; a so- 

 lid body, free, cres- 

 ted, or horned, and 



Genus Octopus .... 1 contained in the in- 



.... Loligopsis 



.. .. Loligo . 



.... Sepia . . . 



terior of most of 

 these animals. Some 

 crawl at the bottom 

 of the sea, others 

 have the faculty of 

 swimming on its 

 surface. 



Fifth Order. Les Heteropodes. 



BODY free, elongated, swimming horizontally; head distinct; two eyes; the arms 

 not in the form of a crown on the summit of the head ; no foot beneath the belly 

 or under the throat for the purpose of crawling ; one or more fins, not disposed 

 in pairs, or any regular order of distribution. These animals, though allied to 

 the C^phalopodes, may be considered as the first vestiges of a series of marine 

 animals, intermediate between them and the fishes, they probably are very nume- 

 rous and much diversified, but have at present escaped observation, or their exami- 

 nation has been neglected. 



f Shell free, elongated; 

 animal swimming 

 horizontally ; head 

 distinct ; two eyes ; 

 no arms surmount- 

 ing the head in the 

 form of a crown ; no 

 foot or fins regular - 



u ly destributed. 



Genus Carinaria 



.... Pterotrachea ... 

 Phylliroe 



* Add the Poulpe cirrhcaux, Lam., loc. cit., pi. i. f. 2, and, in general, severa' 

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

 Fe*russac. 



