298 Lawson . — The Gametophytes and Embryo of the 
other Conifers, the Cupressineae cannot be regarded as a very primitive 
group. They certainly do not present as many primitive characters as the 
Abietineae, but on the other hand they are more primitive than Cephalotaxus. 
Literature Cited. 
Arnoldi, W. (’00) : Beitrage zur Morphologie der Gymnospermen : III. Embryogenie von 
Cephalotoxus Fortunei. Flora, lxxxvii, p. 46, 1900. 
(’00) : Beitrage zur Morphologie einiger Gymnospermen : I. Die Entwicklung des 
Endosperms bei Sequoia sempervirens . Bull. Soc. Imp. Nat. Moscou, 1900. 
(’00) : Beitrage zur Morphologie und Entwicklungsgeschichte einiger Gymnospermen : 
II. Ueber die Corpuscula und Pollenschlauche bei Sequoia sempervirens. Bull. Soc. Imp. 
Nat. Moscou, 1900. 
(’01) : Beitrage zur Morphologie einiger Gymnospermen : V. Weitere Untersuchungen 
iiber die Embryologie in der Familie der Sequoiaceen. Bull. Soc. Imp. Nat. Moscou, 1901. 
Belajeff, W. (’93) : Zur Lehre von dem Pollenschlauche der Gymnospermen. Ber. der Deutsch. 
Bot. Gesell., ii, p. 196. 
Blackman, V. H. (’98): On the Cytological Features of Fertilization and Related Phenomena in 
Pinus silvestris , L. Phil. Trans. Roy. Soc., cxc, p. 395. 
Chamberlain, C. J. (’06) : The Ovule and Female Gametophyte of Dioon. Bot. Gaz., xlii, 
p. 321, 1906. 
Coker, W. C. (’02) : Notes on the Gametophytes and Embryo of Podocarpus. Bot. Gaz., xxxiii, 
p. 89. 
(’93): The Gametophytes and Embryo of Taxodium. Bot. Gaz., xxxvi, pp. 1-27 
and 114-40. 
(’94) : On the Spores of Certain Coniferae. Bot. Gaz., xxxviii, p. 206, 1904. 
Coulter, J. M., and Chamberlain, J. C. (’01) : Morphology of Spermatophytes, Part I. New 
York, 1901. 
Coulter, J. M., and Land, W. J. G. (’05) : Gametophytes and Embryo of Torreya taxifolia. 
Bot. Gaz., xxxix, p. 161, 1905. 
Dixon, H. N. (’94) : Fertilization in Pinus silvestris. Ann. Bot., viii, p. 21. 
Ferguson, M. C. (’01) : The Development of the Pollen-tube and the Division of the Generative 
Nucleus in certain species of Pinus. Ann. Bot., xv, p. 193. 
(’91) : The Development of the Egg and Fertilization in Pinus Strobus. Ann. 
Bot., xv, p. 435. 
Goroschankin, J. (’83) : Zur Kenntniss der Corpuscula bei den Gymnospermen. Bot. Zeit., xli, 
p. 825. ^ 
Hirase, S. (’95) : Etudes sur la fecondation et l’embryogenie au Ginkgo biloba. Jour. Coll. Sci. 
Imp. Univ. Tokyo, viii, p. 307. 
Ikeno, S. (’96) : Das Spermatozoid von Cycas revohita. Bot. Mag. Tokyo, x, p. 367. 
Jager, L. (’99) : Beitrage zur Kenntniss der Endospermbildung und zur Embryologie von Taxus 
baccata. Flora, lxxxvi, p. 241. 
Jeffrey, E. C. (’03 and ’05) : Comp. Anatomy and Phylogeny of the Coniferales. Part I ,Seqtioia ; 
Part II, Abietineae. Mem. Boston Soc. Nat. Hist., vols. 5 and 6. 
Juel, H. O. (’00) : Beitrage zur Kenntniss der Tetradentheilung. Jahrb. f. wiss. Bot., xxxv, p. 626, 
1900. 
(’94) : Ueber den Pollenschlauch von Cupressus. Flora, xciii, p. 56, 1904. 
Land, W. J. G. (’02) : A Morphological Study of Thuja. Bot. Gaz., xxxvi, p. 249. 
Lawson, A. A. (’04) : The Gametophytes, Archegonia, Fertilization, and Embryo of Sequoia 
sempervirens. Ann. Bot., xviii, no. lxix, p. 1, 1904. 
