1915] BRYAN—ARCHEGONIUM OF SPHAGNUM SUBSECUNDUM 53 
14. The breaking down of the canal row may begin at any 
point, is frequently acropetal, but never involves the ventral canal 
cell. 
15. The ventral canal cell is persistent, behaves for a time 
exactly as does the egg, but normally disintegrates just before 
the archegonium opens for fertilization. 
16. Abnormalities, such as double venters, multiple eggs, etc., 
are of common occurrence. 
17. The archegonium of Sphagnum is synthetic, combining cer- 
tain characters of the Hepaticae with others of the Musci. 
The author wishes to express his sincere thanks to Professor 
Joun M. Courter and Dr. W. J. G. Lanp for helpful advice and 
discussion; and to Mr. E. J. Hitt who kindly identified the 
material studied. 
‘ 
UNIVERstry oF CHICAGO 
LITERATURE CITED 
1. CAMPBELL, D. H., Mosses and Ferns. New York. 1905. 
2. Cavers, F., The life history of a peat moss. Cuowintee 33:263-268, 
294-301. IQgIo, 
3. Gaver, L. A., Recherches sur le développement de we chez les 
Muscinées. Aun. Sci. Nat. Bot. VIII. 3:161-258. pls. 7-13. 1897 
4. GorBeL, K., Organographie der Pflanzen. Jena. 1898-1901. 
5. Hormersren, W., Vergleichende Untersuchungen der Keimung, Ent- 
faltung, und Fruchtbildung hdherer Kryptogamen. Leipzig. 1851. 
6. Hotrerty, G. M., The archegonium of Mnium cuspidatum. Bor, Gaz. 
37:106-126. pis. 5,6. 190 
7- JANCZEWsKI, E. von, Veigltcherie Untersuchungen iiber die Entwick- 
lungsgeschichte des Archegoniums. Bot. Zeit. 30:377-393, 401-417; 
440-443. 1872. 
8. Lerrces, H., Wachsthum des Stammchens und Entwicklung der An- 
theridien bei Sphagnum. Sitz. Kais. Akad. Naturwiss. Wien 59':294- 
320. pls. 8-10. 1869. 
9. SERVETTAz, C., Recherches expérimentales sur le développement et la 
mutrition ae Minians en milieux stérilises. Ann. Sci. Nat. Bot. IX. 
17:11I-223, pls. 1-4. 19 
10. ScHImprrR, W. Pu., Vem einer Entwickelungsgeschichte der Torfmoose. 
Stuttgart. 1858. 
11. WALDNER, M, Die Entwickelung der Sporogone von Andreaea und 
Sphagnum, Pp- 25. pls. 1-4. Leipzig. 1887. 
