308 NATURAL SCIENCE [November 
outer layer of this colony in the most primitive Scale-mosses 
is converted into a capsular wall, while the inner cells are re- 
productive cells, each of which forms a brood of four spores. In 
the Leaf-mosses the colonial body formed by the segmentation of the 
coupled-cell is much more modified, with increase of specialisation 
wegelaltve CESSUCS 
Sometimes forms 
Lern- soate sporgplty Ge aireckhy 
(< Gamelophyle) wagelaltve COISuES 
CMOTYORTEC frssue 
rep roduclive cells 
PEWS & (eve or spermatozoa) 
Coupled cell 
Forn-planté | vegetative Céssues buds 
(Sporophy Ce, g 
% 
jersé PPETHSEECO ; 8 
on gurmelophy le, \ 
hen free on cés vepetntive Zissues| . Gude 
ows reces.) : 8 
us = Someltmes forms 
“ pimelphyle directly 
a 
x 
_myorodiucteve Ceces 9 Gucts 
spores 
and corresponding sterilisation; for its lower part is converted into 
a bristle-like stalk, and the wall and centre of the urn-shaped 
capsule are both composed of green tissue adapted for the formation 
of organic food materials. 
Before we group these facts into a table we must notice the 
