mu BOTANICAL GAZETTE [yoxy 
two cases were found, one being illustrated in fig. 70. The arche- 
gonium here contains 17 neck canal cells, 3 of which are shown, 
and has 3 cells in the venter. It seems probable that the 2 lower 
ones were formed by the division of the egg, while the upper is the 
ventral canal cell which has remained undivided. Fig. 71 is the 
reconstruction of a very remarkable double archegonium. It may 
have originated by the fusion of 2 very young archegonia, or by the 
longitudinal instead of transverse division of the primary axial cell. 
Discussion 
Catharinea undulata has been studied by JANCZEWSKI only. 
The present work on the closely related C. angustaia confirms in 
general his statements, especially in reference to the origin and 
development of the canal row. There can be no doubt that the 
cells of the neck canal row in C. angustata are of diverse origins. 
The lower arise through intercalary divisions of the primary neck 
canal cell, while the upper are produced by the intercalary divi- 
sions of at least 3 initials cut from the base of the cover cell. 
Aside from the activity of the cover cell, there is no evidence 
that any one neck canal cell may act as an apical cell in the develop- 
_ ment of the canal row. On the contrary, the evidence is clear that os 
any cell of the neck canal row may divide and in any order. This 
process is also in general agreement with the findings of HoLFERTY 
ce for Mnium cuspidatum, where both apical growth and intercalary 
__ divisions are reported. If Campsext is correct, Funaria shows a_ 
__ striking difference, in that the primary canal cell and the initials cut 
a from the base of the apical cell do not divide after they have been. 
f 
f 
- ormed; while GOEBEL’s account for Mnium undulatum shows still 
oa urther difference, in that one of the neck canal cells at the apex of 
Th 
S _ the canal I cell 2 d by its activity produces the oF 
] - further growth of the canal row. “a these differences are oe : 
= _ firmed, Latex acake saasaews — g series in 
"The facts i in ‘the present paper pe an eophatic decal of . — 
the swe lizz 
: 2 : pecenee give rise to neck canal cells. While the author has ce 
shown in a previous Paper that in Sphapwum subsecandnem 
tion of GavET that among the Musci_ the | : 
