Stiles. — The Podocarpeae . 509 
in Podocarpus are remarkable for their large size and the extent of their 
branching between the nucellus and the prothallus. The body-cell nucleus 
divides into two male nuclei, only one of which is functional. 
4. A short account is given of the present state of our knowledge of 
the Embryology, Seedling Structure, and Geographical Distribution of the 
Podocarpeae, and of the records of fossil plant remains referred to the order. 
5 . Theoretical Considerations. An attempt is made to show the probable 
lines of evolution in the Podocarpeae, and that the Podocarpeae are probably 
related to the Araucarieae, and, though to a much less extent, to the 
Abietineae. Evidence has yet to be produced before a close connexion 
between the Podocarpeae and Taxeae can be recognized. A consideration 
of the available evidence shows that there is much to be said for the view 
that regards the Coniferales as descendants of Palaeozoic Lycopodialean 
ancestors. 
The University, 
Leeds. 
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