fe) BOTANICAL GAZETTE [JANUARY 
10. Lawson, A. A., The gametophytes, archegonia, sarang and See 
of Sequoia depen. Annals of Botany 18: 1-28. pls. 1-4. 
The gametophytes, fertilization, and embryo of | eas iu 
Annals of Botany 18: 417-444. pls..27-30. 1904. 
12. Miyake, K., On the development of the sexual organs and fertilization in 
Picea excelsa. Annals of Botany 17: 351-372. pls. 16-17. 1903 
Contribution to the fertilization and embryogeny of Abies balsamea. 
Beih. Bot. Centralbl. 14:134-144. pls. 6-8. 1 
14. Mourrity, W. A., The development of the archegonium and fertilization 
in the hemlock spruce (Tsuga canadensis). Annals of Botany 14:583- 
607. pls. 31-32. 1900. 
15. Nor&n, C. O., Ueber die Befruchtung bei Nee communis. Arkiv Bot. 
K. Svensk. Vetensk. 3:no. 11. pp. 11. figs. 8. 
16. RoBERTSON, AGNES, Spore formation in Torreya eee New Phytol. 
3: 133-148. pls. 3-4. 1904 
Studies in the onrpholagy of Torreya californica. II. The sexual 
organs and fertilization. New Phytol. 3: 205-216. pls. 7-9. 1904. 
18. STRASBURGER, E., Die Angiospermen und die Gymnospermen. Jena. 1879. 
Ueber das Verhalten des Pollens und die Befruchtungs-Vorgange 
bie den Gymnospermen. Jena. 1892. 
EXPLANATION OF PLATE I 
Fics. 1, 18-21 are in the text 
Fics. 2-17 reduced one-third Magnifications accordingly are now only 
saat the number give! 
2. Body cell, salle nin. and pollen tube nucleus in tip of a pollen 
tube thal ec reached the prothallium. April 21, 1903. X67o0. 
Figs. 3-5. Sperm cells ready for fertilization. May 5 and 8, 1903. 670. 
Fic. 6. Neck cells seen from above. it 
Fic. 7. Neck cells pushed to one side. 
Fic. 8. Ventral canal (v) and egg (e) sere in tip of archegonium. X 370. 
Fic. 9. Archegonium showing ventral canal nucleus and two other nuclei 
below. X 150. 
Fic. 10. Upper part of archegonium with egg e) and ventral canal (v) 
nuclei. X 370. 
Fic. 11. Upper part of archegonium with functional sperm cell approaching 
egg nucleus, and second sperm nucleus above. May 5, 1903. 
Fic. 12. Archegonium and pollen tube just after fertilization; ae nuclei 
in center and second sperm nucleus above. X 150. 
Fic. 13. Fusing nuclei with sperm protoplasm on upper side. 670. 
Fic. 14. Spindle of first division of fusion nucleus; second sperm nucleus 
above. X 370. 
Fic. 15. Two-celled proembryo with two nuclei above. May 8, 1903. 250. 
Fic. 16. Four-celled proembryo near base of archegonium. 670. 
Fic. 17. Eight-celled proembryo in base of archegonium. X67. 
