t917| BRYAN—ARCHEGONIUM OF CATHARINEA 3 
gestion once offered by Lanp, has, in a well blackened bottle, fixa- 
_tive nearly a year old which is just as efficient as when first made up. 
Historical 
HOFMEISTER (6) in 1851 published the first account of the devel- 
opmental processes in the archegonia of the Bryophyta. He 
examined a number of forms both among the Hepaticae and the 
Musci. In the latter group he found the antheridium and the 
archegonium exactly alike in the early stages of development, a 
fact which has been confirmed by subsequent investigations; but 
his account of the formation of the archegonium proper has received 
no confirmation from later workers. It is of interest therefore only 
from a historical standpoint. Among the Musci HorMEISTER 
seems to have examined Sphagnum, Phascum, Archidium, Funarta, 
Fissidens, Dicranum, and Polytrichum. 
In the early stages the growth is by an apical cell with two cut- 
ting faces. In each of the 2 cells thus formed there occurs a radial _ 
longitudinal division. The young archegonium now consists of | 
4 rows of cells. Then the formation of the archegonium proper > 
takes place. In this process the cells of one of these longitudinal 
_ rows divide parallel to the outer wall, thus se acentralrow 
of cells (the canal row) surrounded ed by 4 peripheral cell rows. Later . 
oe of these peripheral cells divide, thus iconnaco cells of the 8 
