B. IT] THE HISTORY OF ANIMALS, 85 



rium in this animal. The position of all these parts may be 

 vseen in dissections. 



1A The creature called carcinium 1 resembles both the 

 malacostraca and the testacea, for this in its nature is similar 

 to the animals that are like carabi, and it is born naked 

 (not covered with a shell). But because it makes its way 

 into a shell, and lives in it, it resembles the testacea, and 

 for these reasons it partakes of the character of both classes. 

 Its shape, to speak plainly, is that of a spider, except that 

 the lower part of the head and thorax is larger. 



15. It has two thin red horns, and two large eyes below 

 these, not within nor turned on one side, like those of the 

 crab, but straight forwards. Below these is the mouth, 

 and round it many hair-like appendages ; next to these, two 

 divided feet with which it seizes its prey, and two besides 

 these on each side, and a third pair smaller. Below the 

 thorax the whole creature is soft, and when laid open is 

 yellow within. 



16. From the mouth is a passage as far as the stomach ; 

 but the anus is indistinct ; the feet and the thorax are hard, 

 but less so than those of the cancri ; it is not united with the 

 shell like the purpura and ceryx, but is easily liberated from 

 it. The individuals which inhabit the shells of the strombus 

 are longer than those in the shells of the nerita. 



17. The kind which inhabits the nerita is different, though 

 very like in other respects, for the right divided foot is small, 

 and the left one large, and it walks more upon this than the 

 other ; and a similar animal is found in the concha?, though 

 they are united to their shells very firmly ; this animal is called 

 cyllarus. 2 The nerita has a smooth, large, round shell, in 

 form resembling that of the ceryx, but the mecon is not 

 black, but red ; it is strongly united in the middle. 



18. In fine w r eather they seek their food at liberty, and if a 

 storm arises, the carcinia hide themselves under a stone, and 

 the nerita3 attach themselves to it like the patella, the 

 ha3morrhois, and all that class, for they become attached 

 to the rock, where they close their operculum, for this re- 

 sembles a lid ; for that part which is in both sides in the 

 bivalves is joined to one side in the turbinated shells : the 

 interior is fleshy, and in this the mouth is placed. 



1 Hermit crab. 2 Cancer Diogenes. 



