94, SIDNEY F. HARMER. 
Internal Structure.—The general appearance of a_ section 
through a colony in which the production of the first brood 
of embryos is at its height will be understood from fig. 11, 
representing a section, parallel to the flat surface, of a colony 
in about the same stage as that shown in fig. 12.1 The section 
has a maximum diameter of °80 mm. The ovicell may be ex- 
plained by comparing its contents with an Ameba with a 
series of blunt pseudopodia extending in the intervals be- 
tween the zocecia. The “ pseudopodia”’ contain a considerable 
number of secondary embryos, and the nucleus may be repre- 
sented by the “fertile brown body.” 
This structure, although an inert body which plays no direct 
part in the development, is in fact the centre about which all 
the most important phenomena in the development of the ovi- 
cell take place. The “ pseudopodia”’ form a complex structure 
for which the name “embryophore”’ may be suggested, and 
they lie in a cavity which may be regarded as the body-cavity 
of the ovicell. 
The zoccia can be identified, in a good and well orientated 
series of sections, by an examination of the proximal end of 
the colony, which, it will be remembered, retains throughout 
life the form assumed by the young Lichenopora. Hence 
it may be confidently stated that z is a section of the pri- 
mary individual of the colony, and that z? and z® represent 
respectively the second and third zowcia, as defined in the 
earlier part of this paper. 
z} possesses a polypide, whose tentacles, enclosed in their 
tentacle-sheath, are seen in the figure; z? is quite empty 
basally, but contains some embryos distally, as shown by the 
figure; z° contains a brown body basally, but it has no polypide, 
and it opens at the level of the section into the ovicell. Two 
of the zoccia contain brown bodies, that of A not being visible 
in the section figured. 
The fertile brown body is in the neighbourhood of z?, near 
whose upper end is developed the trumpet-shaped aperture of 
1 The secondary embryos are more developed in fig. 11 than they would 
have been in fig. 12. 
