ARISTOTLE. 175 



(c.) On Sleep and Waking, (rrepl VTTVOV Kal eypr/yo'po-fwc.) 



Sd.) On Dreams, (-repl tvvirviuv.) 

 e.) On the Prophetic Vision in Sleep, (irepl rijc jcafl' VTTVOV 



(f.) On Length and Shortness of Life. (nepl jua/C|Oo/3tor??roc /ecu 



(g.) On Youth and Age, Life and Death, (jrepl VEOTTITOQ icai 

 KOI Trepl (t)ij Kal 0avarov.) 



(h.) On Respiration. (Trepl avaTrvorjs.) 



XIII. On Breath. (rrepl TOV Trvevfj.aroQ.) This treatise, of which 

 the subject is the same as that of the last mentioned, except that there 

 is more reference in it to the lower animals, has been considered by 

 many not to be by Aristotle. Sylburg considers the style to point to 

 Alexander of Aphrodisias as its author. Meursius thought it pro- 

 bably to be by Theophrastus, and Patritius by Strato, principally 

 because such a book is mentioned by Diogenes among the writings of 

 these. Fabricius considers it to be Aristotle's, because Aristotle him- 

 self, in his treatise ' On the Motion of Animals,' appears to allude to 

 it, and Galen quotes it as his. But neither of these two passages are 

 quite conclusive. 



XIV. Accounts of Animals, (l ....... x). (irepl ra wa icrropiat.} 



This work is variously entitled in the manuscripts, rrepl &W iaropia, 

 TU>V Trepl wu)v icrropia. Pliny (' Nat. Hist.' viii. 17), where he speaks 

 of Aristotle's magnificent work ' On Animals,' in fifty books, appears 

 to include together with this all the treatises on natural history which 

 follow it (and indeed are naturally connected with it), as well as some 

 on comparative anatomy, now lost. The same may be said of Cicero's 

 notice of them (* De Fin.' v. 4.) This work was illustrated by dia- 

 grams of the several parts of animals, which, together with the neces- 

 sary explanations, perhaps formed a treatise by themselves. They are 

 alluded to in several passages by the phrases r/ kv avaroucuz cJmypa^r;- 

 at avaTOfj-ai- at ava.TOfj.al ^laytypajUjufVm. Schneider, who has pub- 

 lished an edition of this work, most learnedly illustrated as regards the 

 subject, not perceiving in it any traces of the injury which Aristotle's 

 works, according to Strabo's account, received, was induced to con- 

 sider it as one of the exoteric publications. But, in fact, the whole of 

 the works on natural history are as closely connected with one another 

 as the several parts of the ' Organum,' and it would be difficult to 

 assign any reason why the one class should be regarded as exoteric 

 and the other not so. 



XV. On the Parts of Animals. (Trepl tyuv popicjv.) (l. II. in. iv.) 



XVI. On the Movement of Animals, (-repl &W Ktrrj^ewg-) 



A curious tract investigating the influences which operate ab extra 

 upon animals. This treatise, together with the one following, and 

 that 'On Breath,' are often put together with the eight tracts 

 before mentioned (No. XII.), and make up what is called the ' Parva 

 Naturalia.' 



