92 ZOOPHYTES. 
89. In the process of germination, above illustrated, a cellule forms 
laterally from the apex of a longitudinal cellule (d, figure 45). This 
new germ-cellule enlarges, until that reproductive agency, whose 
over-accumulation started its existence, has attained its maximum 
in the new cellule; and, going on to accumulate from the vital 
action within, new cellules bud out from that now formed: and so 
cellules bud from one another, two from each preceding, till they are 
prepared to form the sporules at the extremity. The cellules decrease 
in size; and if the view just expressed is correct,—that the same 
amount of force causes the successive buddings,—the process in the 
formation of sporules consists, in part, in the successive condensation 
of the germinating material of the future sporule, until it is collected 
into a space not zis the size of the ordinary cellules in the plant, 
and a gradual concentration of its germinant powers. ‘The final 
cellule at last gives rise to one or more sporules: apparently the mere 
result of continued budding, and a farther elaboration and concen- 
tration of the germinating product. Some facts, however, seem to 
show that the consummating change may consist in the union of a 
final cellule, with some other which is antheridial in its nature ; and 
after this union, the sporules bud out from the combined cellule, or 
form by mere spontaneous fission of the same.* 
I have dwelt upon this example, not because there is any novelty 
in this developement of successive cellules, but from its affording so 
simple and apposite an illustration of the germinant process. The same, 
in the opinion of the best physiologists, is the general mode of deve- 
lopement in other plants, except that anthers intervene to afford 
material to aid in the final elaborations. And in animals, the process 
of growth by cellules, and the modes of developement, are quite 
analogous. 
90. The germinating process may be illustrated by a few more 
comparisons between plants aad zoophytes. The Aulopora has been 
described () 65) as sending out slender creeping shoots at base, 
which, after reaching to a certain length, develope a polyp, from 
* The character of the sporules and their position, as observed, are shown on the last 
plate of the Atlas: figure 1a, the Liagora rubriceps natural size ; 6, a branch magnified 
with the sporidia below ; ¢, sporidia magnified one hundred and fifty diameters ; d, part 
of transverse section of stem, showing the internal cellules cut across and partly disar- 
ranged ; é, e’, longitudinal cellules magnified one hundred and fifty diameters ; f, longi- 
tudinal cellules, with the lateral branch of cellules, and the sporules at apex ; g, one of 
the sporules magnified four hundred diameters. 
