PARTS OF ANIMALS, IV. viii.-ix. 



reason why they have claws is because they belong 

 to a group which has claws ; and tliey have them 

 in this irregular way because they themselves are 

 deformed and use the claws not for their natural 

 purpose but for locomotion. 



For an account of every one of the parts, of 

 their position, and of the differences between them, 

 including the differences between the male and the 

 female, consult the Anatomical treatises and the 

 Inquiries upon Animals.'^ 



IX. With regard to the Cephalopods, their internal (i) Cephs 

 parts have already been described, as have those ^°P°^^- 

 of the other animals.^ The external parts include 



(1) the trunk of the body, which is undefined, and 



(2) in front of this, the head, with the feet round it : 

 the feet are not beyond the eyes, but are outside the 

 mouth and the teeth. Other footed animals either 

 have some of their feet in front and some at the 

 back ; or else arranged along the sides — as with the 

 bloodless animals that have numerous feet. The 

 Cephalopods, however, have an arrangement of 

 their own. All their feet are on what may be 

 called the front. The reason for this is that their 

 back half is drawn up on to the front half,'^ just as 

 in the conical-shelled Testacea. And generally, 

 though in some respects the Testacea resemble the 

 Crustacea, in others they resemble the Cephalopods. 

 In having their earthy material outside and their 

 fleshy material inside, they resemble the Crustacea ; 

 but as regarding the formation and construction of 

 their body they resemble the Cephalopods — -all of 



controversy between G. St-Hilaire and Cuvier about unity of 

 type. This controversy excited Goethe more than the revolu- 

 tion of the same year. (Ogle.) 



M 2 ' 355 



