gaz. BOTANICAL GAZETTE [APRIL 
- ANTHERIDIUM (figs. 15-27).—The antheridium arises as a 
papillate cell from a segment of the apical cell, but never from the 
apical cell itself. The first division is transverse, the inner cell 
being the stalk cell, and the outer cell producing the spermatoge- 
nous cells and the jacket. The next wall may divide the stalk cell 
transversely, or both stalk cell and outer cell may divide vertically. 
If the first division of the outer cell is not by a vertical wall, vertical 
walls appear in the next two divisions. Periclinal walls then differ- 
entiate jacket and spermatogenous tissue. The jacket becomes 
several cells thick by periclinal divisions, and by further divisions 
the spermatogenous tissue appears as blocklike masses of cells. 
At maturity, the stalk of the antheridium is long and slender, and 
uniformly two cells in thickness. 
SPOROPHYTE (figs. 1o-14).—Only mature stages of the sporo- 
phyte were represented in the material. Great variation in the 
shape of the foot was observed, from the club-shaped foot illustrated 
by CAMPBELL (3) to a more or less definite anchor-shaped foot. 
There is no elaterophore, or any grouping of the elaters, but @ 
general distribution of elaters through the capsule. 
I am indebted to Professor Joun M. Coutrer and to Dr. W. 
J. G. Lanp for advice and material during the progress of the 
investigation. 
UNIVERSITY OF CHICAGO 
LITERATURE CITED 
1. ANDREWS, F. M., An abnormal Porella platyphylla. Bot. Gaz. 45*34° 
Jigs. 3. 1908. scm 
2. CAMPBELL, D. H., Resistance to drought by liverworts. Torreya 4:0F°™ 
1904. 
, Mosses and ferns. New York. 190 ‘ 
eas 'B. M., The origin of the kaon Ann. Botany 17:477-49?" 
eas 
ieee and Prantt, Die natiirlichen Pflanzenfamilien. 1895. 
GoEBEL, K., Organography of plants. Oxford. 1905. 
Lerrces, H., Untersuchungen tiber die Lebermoose. Jena. 1874- 
. Lyon, Fiomence M., The evolution of the sex organs of plants. 
37:280-297. 1904. 
PIAA 
Bor. GAZ 
