1909] SAXTON—WIDDRINGTONIA CUPRESSOIDES 175 
8. Jacket cells are either absent or sometimes very feebly devel- 
oped, and apparently neck cells are entirely absent from the arche- 
gonia. . 
9. The central nucleus of the archegonium probably divides to 
form the egg nucleus and a ventral nucleus. 
10. By karyokinetic divisions in the prothallus cells, about and 
after the time of fertilization, they become binucleate and in some 
cases four- or even five-nucleate. 
11. The multinucleate condition persists, differing in this respect 
_ from Cryptomeria, as well as in the origin of the binucleate cells. 
12. The haploid and diploid numbers of chromosomes are respec- 
tively 6 and 12 (approximately). In two species of Callitris the 
numbers are approximately 12 and 24. iim HO 
13. From the occurrence of proembryos and embryos in pairs it 1s 
concluded that fertilization of two archegonia is effected by two 
sperms from a single pollen tube. ; 
14. The proembryo contains eight or more cells, one of which 
forms a’suspensor and the other the embryo. Early stages of the 
proembryo are wanting. 
15. Embryo development is quite normal, and embryonal tubes 
_ are formed. 
16. A resemblance is noted in certain points with the development 
of Sequoia sempervirens. 
17. A comparison is provisionally suggested with the Gnetales, 
especially with the genus Tumboa. 
SOUTH AFRICAN COLLEGE 
CAPETOWN 
LITERATURE CITED 
An asterisk indicates that the original paper has not been consulted. 
I. *ARNOLDI, W., Beitrige zur Morphologie und anes pee 
einiger Gymnospermen. II. Ueber die Corpuscula und — 
bei Sequoia sempervirens. Bull. Soc. Imp. Nat. Moscou. 1900: 
?- BENTHAM, G., AND Hooker, J. D., Genera plantarum. ee 
3- Botus, H., anp Wottey-Dop, A. H., A list of the flowering, Yan 
ferns of the Cape Peninsula with notes on some of the critical species. 
S. Afr. Phil. Soc 14: I 
. Soc. 14: - 1903. 
4. Buruincame, L. L., The staminate cone and male gametophyte asad 
carpus. Bor. GazetreE 46:161-178. 1908. 
