5 1 6 Gibbs . — On the Development of the 
In the species in which the seed-coat remains unmodified prior to 
fertilization, in the little material available, archegonia were well shown. 
On the other hand, in those species which develop a stony layer and 
show a lignification of the integument before fertilization the material, 
though excellent for the morphology of the strobilus, was useless for 
embryological detail. 
There is, consequently, in this paper a gap in the sequence of the 
development of the female gametophyte of the different species described, 
viz. from the enlargement of the macrospore to the archegonium stage, 
just prior to fertilization. As far as one can judge from imperfect material 
these stages seem to agree essentially with what has been observed in other 
families of the Coniferae. 
As soon as embryo formation begins, so much starch is laid down 
in the prothallus that contraction is eliminated and the stages can be 
followed. 
It will be understood, therefore, that where a point could be sub- 
stantiated in the embryological development it has been given, in the 
hope that it may prove of comparative value to future workers, but this 
investigation is primarily on the morphological side. 
The systematic arrangement of the species enumerated in this paper 
is based on Pilger’s Monograph of the Taxaceae in Engler’s ‘ Pflanzen- 
familien ’ series. How far the results of the present investigation modify 
that arrangement, in the opinion of the author, will be shown at the end 
of the paper. 
A table of the species collected is appended, giving locality, date, 
and ovular development. 
Material collected in Podocarpus, L’Herit. 
‘ Ovulum , cum carpidio connatum , carpidium ovidmn apicido obtuso 
superansi 
Sect. I. Dacrycarpus, Endl. 
P. imbricata ) Bl. Nadarivatu, Fiji. Sept. 1907. 
Archegonial cavity (sterile). 
P. imbricata. Singapore, Bot. Gardens. Dec. 1909. 
Pollination (sterile). 
P. imbricata . Buitenzorg Bot. Gardens. Dec. 1909. 
Pollination (pollen-tube). Archegonia, resting oosphere. 
P. imbricata. Kinabalu, Brit. N. Borneo. Feb. 1909. 
Pollination. Archegonial cavity (sterile). 
P. dacrydioides , A. Rich. Nihotupu, Auckland, New Zealand. Oct. 
1907. 
Pollination (pollen-grains). Female gametophyte (free nuclei). 
