20 Lawson . — The Gametophytes , Fertilization and 
Several cases of budding from the main group of embryo-cells were 
found, resulting in the formation of small secondary embryos, but as 
a rule one archegonium produces but a single embryo. 
From this account of the gametophytes it becomes obvious that 
Cephalotaxns cannot be regarded as a primitive type of Conifer, although 
this is contrary to results obtained from certain studies on the sporophyte. 
From his investigations on the vascular structure of the ovule Worsdell (’00) 
regards Cephalotaxns as the most ancient of the Coniferous genera, and con- 
cludes that ‘ this genus forms in some measure a connecting link between 
Cycadaceae and Coniferae, and helps us to trace, however faintly, a fragment 
of the line of descent of the latter group.’ By comparing the gametophytes 
of Cephalotaxns with the Cycadales and with other Coniferales I cannot 
accept Worsdell’s view. In fact I am forced to the conclusion that this 
genus represents a very recent type of Conifer. 
Jodrell Laboratory, 
Royal Botanic Gardens, 
Kew. 
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4 
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