16 BOTANICAL GAZETTE [JULY 
8. The cells of the canal row and the peripheral cells of the 
neck grow by intercalary divisions, and in any order. 
9. The major growth of the archegonium is intercalary. 
to. The cells of the neck canal row have a double origin. The 
lower are formed by the intercalary divisions of the primary neck 
canal cell; the upper through the intercalary divisions of the 3 or 
more initials cut from the base of the cover cell. 
11. The ventral cell divides relatively early into ventral canal 
cell and egg. 
12. The ventral canal cell is variable in size. 
13. The mature archegonium has usually more than 50 neck 
canal cells, and may contain as many as 86. 
14. The canal row is generally multiple in its upper part and 
occasionally throughout. 
15. The disintegration of the canal row is acropetal, but does 
not involve the ventral canal cell. 
16. If the number of neck canal cells is an indication of primi- 
tiveness, the most advanced group of the mosses has the most 
primitive archegonium yet described among the Bryophyta. 
UNIVERSITY OF WISCONSIN 
1. BRYAN, GEO. ‘S., The t ium of sors bs lum. Bor. Gaz. 
— $9:40-56. pls. 4-7. 1915. 
2. CAMPBELL, D. H., Mosses and ferns. New York. ‘1905. 
3- CHAMBERLAIN, C. J., Methods in plant histology. Chicago. rots. : 
+ Gayvet, L. A., Recherches sur le développement de Varchégone chez les 
- Muscinées. = Sci. — Bot. VIII. 3:161-258. ag 7-13. eile 
5. GoEBEL, K., Sapecwreand of plants. Oxford. 190. 
6. Ho a a 
= V Reiman, Ents 
. und F 1 ee eg oe | - T eipzi 
7. Hoxrerty, G. M., The Pee of Mnium Baa Bor. Gaz. 
-372106-126. pls. 5, 6. 1904. | 
8. Hy, F., Recherches sur Parchézone ct le dé ppement du fruit 
a cinées. Ann. Sci. Nat. Bot. VI. 18:105-206. pls g-r4- 1884. Ceo 
o “p- Janczewst, E — Vergleict iiber die Entwick- 
lungsge te Sn Bot. eit. 3 30137-3903, mE, 
ro. eh naa t ag gsgt hick der Andreacaceen. ‘Schenk und 
os nem gebe F Botanik. 4:51. a 
