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KIRKWOOD: POLLEN-FORMATION IN CUCURBITACEAE 239 
LITERATURE 
. Allen, C. E. The early stages of spindle formation in the pollen- 
mother-cells of Zarvix. Ann. Bot. 17: 281-312. pl. 14,15. 1903. 
Byxbee, E. S. The development of the pollen-mother-cells of 
Lavatera. Proc. Calif. Acad. Sci. III. 2: 63-82. pl. Z0-12. I9g00. 
Cannon, W. A. Studies in plant hybrids: spermatogenesis of 
hybrid cotton. Bull. Torrey Club 30: 133-172. p/. 7, 8: I903. 
Studies in plant hybrids: spermatogenesis of hybrid peas. 
Bull. Torrey Club 30: 519-543. pl. 17-19. 1903. 
. Cardiff, I. D. A study of synapsis and reduction. Bull. Torrey 
Club 33: 271-306. p/. 12-15. 1906. 
. Coulter, J. M. & Chamberlain, C. J. Morphology of angio- 
sperms. New York, 1903. 
Davis, B. M. Studies on the plant cell. Am. Nat. 38: 367- 
3955 431-469; 571-594; 725-760; 39: 217-268; f. 1-78. 
(Parts I-IV, r904. Part V, 1905.) 
. Duggar, B. M. Studies in the development of the pollen grains 
in Symplocarpus foetidus and Peltandra undulata. Bot. Gaz. 29: 
81-98. A/. 7, 2. 1900. 
- Gager,C.S. The development of the pollinium and sperm-cells 
in Asclepias Cornuti Decaisne. Ann. Bot. 16: 123-148. pi. 7. 
Tgo2, 
‘ Galinski, S. J. Ein Beitrag zur Entwickelungsgeschichte des 
Androeceums und des Gynaeceums der Griser. Bot. Centralb. 
95: I-17; 62-72; 129-135; pl. 1-7. 1893. 
- Guignard, L. Nouvelles études sur la fécondation. Ann. Sci. 
Nat. Bot. VII. 14: 163-296. pl. 9-78. 1891. 
- Hus, H. T. A. Spindle formation in the pollen-mother-cells of 
Cassia tomentosa L. Proc. Calif. Acad. Sci. III. 2: 329-354- 
Pl. 30-32. 1904. 
: Lawson, A. A. Some observations on the development of the 
karyokinetic spindle in the pollen-mother-cells of Codaea scandens 
Cov. Proc. Calif. Acad. Sci. II. 1: 168-188. f/. 33-36. 1898. 
: Lloyd, =. 2. The comparative embryology of the Rubiaceae. 
Mem, Torrey Club 8: 1-112. pl. 1-15. (Part I, 1899. Part I, 
1902.) 
: Merrell, W. D. A contribution to the life history of S#phium. 
Bot. Gaz. 29; 99-133. 1900. 
