THE OVARIAN EGG. 279 
Multiplication by division occurs also normally 
in adult animals that have completed their growth. 
This is especially frequent among Worms; and 
strange to say, there are species in this Class 
which never lay eggs before they have already 
multiplicd themselves by self-division. 
Another mode of increase is that by budding, 
as in the Corals and many other Radiates. The 
most common instance of budding we do not, 
however, generally associate with this mode of 
multiplication in the Animal Kingdom, because. 
we are so little accustomed to compare and gen- 
eralize upon phenomena which we do not see to 
be directly connected with one another. I allude 
here to the budding of trees, which year after 
year enlarge by the addition of new individuals 
arising from buds. It must be remembered here 
that I use the word individual simply in its scien- 
tific sense, as designating singleness of existence, 
and I trust that its usual acceptation will not 
prevent a correct appreciation of the true re- 
lation of buds to their parents and to the beings 
arising from them. All buds have the same 
organic significance, whether they drop from the 
parent stock to become distinct individuals in the 
common acceptation of the term, or remain con- 
nected with the parent stock, as in Corals and in 
trees, thus forming growing communities of com- 
bined individuals. Nor will it matter much in 
