iDe partibus 

 / -. I animalium 

 ^ I De incessu 



I animalium 



GENERATION OF ANIMALS 



portion of Aristotle's zoological works, of which the 

 scheme may be exhibited as follows : 



I. Record of observations. 

 Historia animalium. 



II. Theory based upon observations (including also 

 many observational data). ~ 



treating of the " matter " of 



animals and the way in which it 



is arranged to subsers^e their 



various purposes ; i.e., their 



" parts," excluding those used 



in reproduction. 



{h) De anima treating of the " form " of animals 



— i.e., Soul, and its " parts " or 



functions. 



iParva naturalia \ treating of the functions " common 



(c) - De motu to body and Soul," excluding 



I animalium J reproduction. 

 {d) De generatione treatmg of the " parts " used in 

 animalium reproduction, and of the repro- 



ductive functions (which are 

 common to body and Soul). 



The section (b) is necessary to the completeness of 

 the scheme, but as it has given rise to a whole depart- 

 ment of study, it is usually treated apart from the 

 rest. Thus the main bulk of the zoological and 

 biological works may be taken to consist of the three 

 great treatises H.A., P. A. and G.A.^ It was these 

 which, through Latin translations made from the 

 Arabic, were restored to the West by those who 

 revived scientific studies at the beginning of the 13th 

 century. 



It is generally held that the zoological works were Dat« of 

 written during the second period of Aristotle's tron.^°*' 

 " For abbreviations, see p. Ixxvi. 



vii 



