80 PROCEEDINGS OF SOCIETIES. 
either remaining adherent to their parent-stocks, as in the 
Sertularian and other Zoophytes, or floating off, as in Hydra 
and many others, so we find the buds of plants remaining 
attached to the tree, or becoming separated from it. Just 
too as we find a different form assumed by the secondary 
offspring of the ‘ nurse,’ as in the scolex-head of the cystic- 
worm, so we find in such cases as those presented by the 
‘bulbillus,’ the ‘bulb,’ and the ‘sporule, different forms 
assumed by parts having the same relations in the plant as 
in the animal. So likewise in the plant we find a greater 
change of the secondary offspring taking place, when sexes 
are developed and flowers are produced, and the hermaphro- 
dite flower with its stamens and pistils is the representative 
of the segments (proglottides) of the tape-worm, with its 
male and female apparatus in a common envelope. We may 
go yet further with our analogies in the vegetable kingdom. 
Here also we have numerous cases in which the germ-cell, 
the ovule, is produced, and develops within itself an embryo, 
quite independent of the influence of the sperm-cell—the 
pollen. The cases seem to me to have a strict analogy, and 
no more simple way could be found of mastering the details 
of the reproductive phenomena of animals than by studying 
those in plants.” 
The paper was illustrated by the followimg diagram : 
GENESIS. 
Growth—Reproduction— Generation. 
HoMocENEsis. HETEROGENESIS. 
(Reproductive force acting through (Reproductive force acting through 
similar cells.) dissimilar cells, sperm-cells and 
germ-cells.) 
It is represented in— It is represented in— 
A. Plants by Phytoids. A. Plants by 
1. Isophytoids. 1. Gynophytoids. 
Buds. Female flowers. 
Pistillidia, &e. 
2. Allophytoids. 2. Androphytoids. 
Bulbilli. Male flowers. 
Bulbs. Antheridia, &e. 
Sporules, &c. 3. Androgynophytoids. 
> Hermaphrodite flowers. 
B. Animals by Zooids. B. In Animals. 
J. Isozooids. 1. Gynozooids. 
Gems, or buds. Females. 
2. Allozooids. Fi) Oe 
* Nurses ” (Steenstrup). 2. A nay suit 
** Avamozooids”’ (Huxley). oy 
“Virgin Aphides”’? (Owen). 3. Androgynozooids. 
“ Agamic eggs” (Lubbock), Hermaphrodites. 
“Drone bees” (Siebold). 
