1917] BRYAN—ARCHEGONIUM OF CATHARINEA 9 
initial produced by the mother cell of the egg; (8) SERVETTAZ states 
that in Phascum the canal row is formed by the basipetal divisions 
of the central cell; (9) the author has shown by division figures 
that in Sphagnum subsecundum the growth of the canal row is 
entirely intercalary. 
It is evident that the Bryales are in need of a reinvestigation, 
not a superficial examination of many forms, but a careful inten- 
sive study of representative forms showing as far as possible by 
actual division figures the course of development. It is with such 
an idea in mind that the present work has been undertaken. 
Development of archegonium 
The apparently dioecious Catharinea angustata here studied 
produces a fairly large number of archegonia on each gametophore. 
The count shows variability with an average of about twenty. 
As previously stated, young archegonia begin their appearance 
early in April, and by the middle or end of May the majority © 
have reached maturity. The first archegonium arises from the 
apical cell region, but whether from the apical cell itself or from 
one of its immediate segments cannot be stated positively at 
present. The study of the behavior of the apical cell in the pro- 
duction of archegonia and the continued growth of the gameto- _ 
phore, if fertilization does not occur, must be reserved for a later — 
paper. Tn its hy § stages tk a DY the usual eB 
1ethod of an apical I cell with t vo cutting ; faces (igs. 1335, 7-9). . 
n the 1. an Wawa ween a ce oe eptions to ; 
this statement have been found a 2, 6). “In both cases. a 
young ir very crowded quarters, being 
ps chsely surrounded by the stalks of archegonia nearing maturity. _ Be 
‘After a variable number of segments, — = have been oo 
the apical « ell 
ua UY | - 
