74 BOTANICAL GAZETTE [JANUARY 
8. Several growing points are organized in the female receptacle 
from segments of the apical cell of the thallus, and each new apical 
cell comes to lie in a receptacle notch. Only 1 (rarely 2) archego- 
nium is formed from the immediate segment of each apical cell. 
The writer is very grateful to Dr. W. J. G. LAND for the material 
used in the investigation and for his encouragement and suggestions 
during the course of the study. 
Sr. LAWRENCE UNIVERSITY 
Ca 
LITERATURE CITED 
1. BARNES, CHARLES R., and Lanp, W. J. G., Bryological papers. I. The 
origin of air chambers. Bor. Gaz. 44:97-186. 1910. 
2. Cavers, F., The interrelationships of the Bryophyta. IT. Marchantiales. 
New Phytol. 9:93-112, 157-186. 1910 
Dovutn, Cu. and R., Le Reboulia Raddi. Rev. Gén. Bot. 30:129-145. 191 
DURAND, E. , The development of the sex organs and sporogonium of 
Marchantia dolvmersho a. Bull. Torr. Bot. Club 35:321-335. 190 
5- JANCZEWSKI, Ep. von, Vergleichende Untersuchungen iiber die Ent- 
wicklungsgeschichte des Archegoniums. Bot. Zeit. 30:386-380. 1872. 
6. LertcEeB, H., Untersuchungen iiber die Lebermoose. 6. Die Marchantieen. 
raz. 1881. 
7. SCHIFFNER, V., Hepaticae in Engler and Prantl’s “Natiirliche Pflanzen- 
familien.”’ 13:1-38. 1909. 
8. STarR; ANNA M., A Mexican Aytonia. Bor. Gaz. 61:48-58. 1916. 
. STEPHANI, F., Species Hepaticarum. Bull. Herb. Boissier 6:790-799. 
1898. 
. STRASBURGER, E., Die Geschlechtsorgane und die Befruchtung bei Mar- 
chantia polymorpha, L. Jahrb. Wiss. Bot. 7:409-422. 1869-1870. 
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