ON THE DEVELOPMENT OF LICHENOPORA VERRUCARIA. 183 
and has but few nuclei. It seems to be growing down from 
the brown body to enclose the embryo. The very large size 
of the brown body is at once apparent, and judging by the 
condition of the other polypides of the colony it may be inferred 
that it has been formed by the degeneration of a large polypide 
(cf. p. 130). The investment of the brown body is well deve- 
loped, highly protoplasmic, and full of nuclei. 
Another old colony in which I have found the same pro- 
cesses taking place measured 3°4 mm. Its ovicell was well 
developed, and the polypides and testes were large. The ordi- 
nary zocecia were not accompanied by brown bodies, and no 
eggs were found. In this case I discovered no less than eleven 
primary embryvus, each of which was contained in an embryo- 
phore supported by a large fertile brown body. ‘The evidence 
given by these cases is quite concordant. ‘The brown body is 
as characteristic a feature of the second generation as it was 
of the first, and its presence indicates that the primary embryo 
is developed in relation with a polypide. Moreover the space 
in which the embryophore of fig. 36 lies is clearly a zocecium. 
One of the eleven embryos of the larger colony has already 
given rise to a good many secondary embryos, and its brown 
body is broken up into fragments. The other ten have a com- 
pact brown body, and are in a condition which exactly corre- 
sponds with Stage F of the first brood. In all these primary 
embryos, fission has commenced and is going on vigorously. In 
one case the embryophore is beginning to grow out of the 
space in which it was produced into the general cavity of the 
ovicell. 
The later development of the primary embryos of the second 
brood is thus identical with that of the first brood, but it is 
probable that the details of the early development are some- 
what different. One of the noteworthy features of the case 
is the large number of zocecia which may become fertile in a 
single colony. 
I have unfortunately no other observations on this interesting 
part of the life-history of L. verrucaria. From the great 
clearness of the embryo in all the cases observed, it is quite 
