baccata, with Remarks on the Antiquity of the Taxineae . 125 
gradually shifts nearer and nearer to the subnucellar pad of tracheides 
which also gives rise to the 4 inner ’ system. During this process the basal 
parts of the two outer strands may be imagined to cut their way through 
the stone, somewhat like a hot piece of wire stretched tight and pressed 
against a block of wax, so that the regions through which it has passed have 
again solidified. In the figures these regions of the stone have for the sake 
of clearness been distinguished by a different method of shading. Thus we 
see that the proximal parts of these strands, ascending and entirely outside 
the stone in Cardiocarpus , become horizontal and partly included in the 
