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tury Dietionary and therefore, consistently with the principles adopted 
by Buckman and Bather and myself to depart from established 
terms as little as practicable, it should be perpetuated. It has not 
deserved the sharp criticism of these authorities, since it is not an 
“impossible corruption of the Greek«. It is a convenient term and not 
worse etymologically than one those authors themselves adopted and 
another which they proposed. Embryonic has a precisely parallel 
history, there being in Greek no authority for the use of the termina- 
tion »ic«, but this is adopted by them without comment. Hypostrophic 
derived from oürostpowr, also having no authority for its termination 
in »ic« was one of the terms proposed by them. So far as the purity 
of the language is concerned I see no reason why they should not do 
this since there is no Greek word to which »hypostrophic« could be 
referred that would make confusion. 
The Phylum. 
Buckman and Bather propose to use the prefix »phil« for forms 
occuring in the Phylum which represent in their adult development 
the stages in the evolution of the phylum which correspond with 
those of the Ontogeny and give an instructive table in which 
Haeckel’s physiologic terms are placed side by side with those pro- 
posed for the morphic phenomena. In following out the same ideas 
the following table has been constructed which differs from theirs only 
in the use of nepionic as stated above, and in the interpolation of 
phylanaplasis etc. as correspondents of anaplasis in ontogeny. 
Summary Table (III. 
Ontogeny or Ontogenetic 
Phylogeny or Evolution of the 
Development Phylum 
Structural- Structural- ; 
Conditions © Stages Conditions Stages Dynamical 
Embryonic Phylembryonic 
Anaplasis Nepionic Phylanaplasis Phylonepionic Epacme 
Neanic Phyloneanic 
Metaplasis Ephebie Phylometaplasis Phylephebie - Acme 
Paraplasis Gerontie Phyloparaplasis Phylogerontic Paracme 
The Cycle. 
Phylum expresses genetic connection, cycle the totality of the 
phenomena whether morphic or physiologie which is exhibited by 
ontogeny, phylogeny, or the physiological phenomena alone. Thus 
one can describe the cycle of the phylum in its rise and decline, the 
epacme, acme and paracme as purely dynamical phenomena exhibited 
