ON THE DEVELOPMENT OF LICHENOPORA VERRUCARIA. 115 
Phylactolemata. In spite of the admirable researches of 
Braem (4) and of Kraepelin (11), the mode of the first origin 
of the statoblasts cannot be said to be beyond doubt. Although 
in the absence of any observations of my own on this point I 
do not wish to commit myself to this view, it appears to me not 
impossible that some connexion exists between the formation 
of the statoblasts and-the process of embryonic fission. The 
natural view of older writers that the statoblasts are winter 
eggs may hereafter prove to have had more truth in it than 
has recently been supposed. Verworn (21), indeed, has at- 
tempted to resuscitate the older view, although his results 
have not commended themselves to later inquirers. Braem’s 
description and figures in particular lend some colour to the 
suggestion that the formation of the statoblasts may be a modi- 
fied form of embryonic fission. For fear of being misunder- 
stood I must, however, repeat my statement that I do not con- 
sider that I have sufficient grounds either for accepting or for 
rejecting this suggestion. 
We may now return to the consideration of Lichenopora, 
and we pass to— 
Stage D.—Suspensor Stage, with Definitive Fertile Brown 
Body. 
The normal occurrence of this stage is supported in the 
clearest possible manner by my sections. 
Fig. 28 represents a typical case. The colony measures 
‘43 by ‘37 mm., and it contains six brown bodies, one of which 
is fertile, while each of the others is accompanied by a poly- 
pide. No other zoccium is sufficiently old to have a polypide, 
and the colony is one in which this stage of development has been 
reached comparatively early. zis fertile; it contains a brown 
body, from which the embryophore hangs down into the zoe- 
cium. The brown body is not directly connected with the 
orifice of the zoccium, although it is now situated near the 
upper end of the body-cavity. 
Fig. 27 (Pl. 9) is probably a somewhat later stage, in 
which the brown body has come close up to the layer of body- 
