430 



from the same root, and, being congruous with the other terms, is the 

 obvious word to employ. 



4) Ephebic. The Avord »EpheboUc« has greatly puzzled us. We 

 can only explain it as a corruption of »Ephebologic«. but the »logic« 

 is unnecessary, while the word ecprjßixdc, the adjective of scprjßo«;, gives 

 the exact term required. 



5) Gerenti c. The word » Geratologic « is stated by its author to 

 be derived from yspaç; this, however, instead of denoting »old age«, 

 means »a gift of honour«. There is a word y^paç, with a genitive 

 •yrjpaToç used by very late authors, it is true; but even so there remains 

 the unnecessary »-logic«. The proper word to use is clearly Yspovrixoc. 



5a) Catabatic. »Clinology« can only mean the Science of Bed- 

 making, so »Clinologic« cannot be used in the sense attributed to it 

 by Hyatt. Karaßarixo; which we have chosen to replace it, means 

 literally »affording an easy descent«, and is the best word not already 

 occupied that we can find. It should at least be readily understood. 



5b) Hypostrophic. »Nostologic« is open to the same objection 

 as »Embryologie». The word we suggest, derived from u-oarpocpr;, a 

 recurrence or relapse, seems to convey the exact meaning with greater 

 clearness. 



Definitions of the terms. 

 It is only possible to define these stages in a very general way, 

 for their characteristics vary greatly in the different classes of animals. 

 It is moreover impossible to draw any hard and fast line between the 

 successive stages, except in rare instances. The following definitions 

 are generalized from the evidence of those groups to which the prin- 

 ciples of auxology have already been applied. 



1) Embryonic. This stage includes all individual history from 

 the ovum up to the time when the organism can be referred definitely 

 to its class. This stage has been sub-divided by the American authors 

 into Protembryo , Mesembryo, Metembryo, Neoembryo, Typembryo 

 and Phylembryo. 



2) Brephic stage immediately succeeds the Embryonic, and dur- 

 ing it no specific characters can be distinguished. 



3) Neanic. During this stage specific characters and all other 

 morphological features present in the adult, appear and undergo deve- 

 lopment. 



4) Ephebic stage denotes the period of full development of the 

 individual, when all specific characters are clearly recognisable. 



5) Gerontic. During this stage changes take place which are 

 due to gradual failure of powers. The stage may be sub-divided into: 



