ace) The Botanical Gazette. {April, 
Bower,* but it does not seem to be out of place to insist here 
that such structures and organisms are even less aptly com- 
pared with the Gamozoa. : 
It will be recognized as of high importance to discriminate 
in the two divergent phyla of plants and animals the truly 
double and parallel composition of each of the upper series. 
And, since the structural development in the two phyla var- 
ies reciprocally, it is not possible to compare them without 
clearly perceiving the double nature of each. For in the 
Metaphyta the sexual series has undergone progressive strut- 
tural degeneration from the mosses to the highest of the Si- 
phonogama, while in the Metazoa the sexual series manifests 
increasing complexity from the lowest Ccelenterata to the 
Primates. On the other hand, in the plant phylum, spofo- 
mal phylum. __The essential diagnostic character © 
Metaphyta might be described, indeed, as sharply ch 
specific dimorphism. While the higher animals may, for ¢ 
ct aa be separated into two groups of organisms - 
ony In sex, the higher plants may, for each species, 
vided into fi : Lee 
. . - 2 
bearing, the pistil-bearing, the male (pollen-tube) and Be 
female embryo-sac contents). This conception of me 
: ‘Bower: Antithetic and Homologous Mhettctionj Aan. of Bot. IV, ae ; 
*MacMillan: Amer. Nat. XXV, 22—25, 1891. 
