PARTS OF ANIMALS, III. xiv.-xv. 



it is apparent only in the larger ones, and in them 

 only when they are fasting, not when they have 

 recently been eating, for Avhen they are fasting, there 

 is an interspace between the two receptacles, whereas 

 Λvhen they have been eating, the time taken by the 

 change is short.** In females the jejunu7)i can have its 

 place in any part of the upper intestine ; in males 

 it is placed immediately before the caecum and the 

 lower gut. 



XV. What goes by the name of Rennet is present Rennet 

 in all animals which have a multiple stomach ; the 

 hare is the only animal with a single stomach which 

 has it. In the former class the rennet is not in the 

 paunch ^ nor in the reticulum, nor in the abomasum (the 

 last of the stomachs) ; but in the stomach between 

 the last one and the first ones, i.e. the so-called 

 omasum (manyplies)." All these animals have rennet 

 because their milk is so thick ; similarly, the single- 

 bellied animals have no rennet, because their milk 

 is thin. This also explains why the milk of horned 

 animals coagulates, while that of the hornless does 

 not. As for the hare, it has rennet because it feeds 

 on herbs with fig-like juice ; and this juice can 

 coagulate the milk in the stomach of sucklings. I 

 have stated in the Problems^ why, in the animals 

 that have many stomachs, the rennet is formed in 

 the manypUes. 



transmuted inside it (see above, 675 b 32), it is not visible, 

 because the change is eifected so rapidly. 



'' Lit. " the great stomach." 



•^ See above, 674 b 14 if. 



■* No such reference can be found. 



301 



