449 
Insectivorous Plants (Part II). 
being visible under Leitz objective with No. i eye-piece. The 
demarcation of the glandular and detentive surfaces is very 
sharp, as the cells of the latter are straight-walled. From 
a few of these the long slender hairs of the detentive surface 
(Fig. 6 d') spring. 
A separate glandular surface does not exist in 5. variolaris , 
and the junction of conducting and detentive surfaces, though 
sharply marked so far as the size and distribution of the hairs 
goes, is scarcely traceable in the character of the surface-cells, 
which remain nearly uniform throughout. In the hybrid one 
reaches an area just below the inferior limit of the conducting 
surface, where many of the epidermal cells are devoid of hair- 
processes, are considerably elongated, and have sinuous walls, 
thus presenting a very average type between the wavy-walled 
cells of the one parent and the straight-walled cells of the 
other. But a few of the cells are thick and straight-walled, 
and grow out into long delicate hairs typical of a detentive 
surface. It is the occurrence of these on what is undoubtedly 
the representative in the hybrid of the glandular surface of 
S. purpurea that causes me to regard that surface as a modifi- 
cation of the upper part of the detentive area. There are 
numerous glands, as one might expect. 
The surface-cells of the detentive region in S. purpurea 
are polygonal and rather thin-walled ; the detentive hairs are 
very long and fine (Fig. 6 d'), the larger ones measuring i *6 mm. 
Glands are entirely absent. The surface-cells in 5. variolaris 
are elongate-sinuous and thick- walled ; the detentive hairs 
are fine but short, the longer ones measuring *5 mm. Nu- 
merous glands are found over the upper region, but disappear 
entirely from the lower. In the hybrid the surface-cells are 
slightly elongate and show faint traces of a sinuous outline ; 
in thickness they rather seem to approach the latter parent ; 
the longest detentive hairs are i to i-a mm. It is thus 
evident that every epidermal cell of the hybrid pitcher reveals 
the blended action of the sexual elements of both parents. 
As regards the lid-hairs and the cells from which they spring, 
one might suppose that these are reproduced in an unaltered 
