12 
Saunders —On the Structure and 
flower contains two or three drops of very sweet nectar at the 
base of the flower tube, and (2) the size of the secretory cells 
is comparatively large. 
After trying various hardening reagents, I found that the 
structure of the cells was best preserved by treatment for 
three or four days with a 2 per cent, solution of ammonium or 
potassium bichromate (as a rule the former gave the best 
results). The ovaries only were hardened, and in order to 
ensure that the solution should penetrate as rapidly as pos- 
sible, portions of the external cuticle were stripped off, and 
the extremities of the ovary itself were removed by trans- 
verse section, before it was placed in the hardening fluid. 
I examined the following species of Kniphofia ; K. nobilis , 
media , aloides var. max.> and uvaria , but I was unable to 
detect any differences in the histological appearances which 
I could regard as specific ; the following account therefore 
applies equally to them all. I propose to describe 
I. The position and course of the glands, and 
II. The minute structure of the cells which compose the 
gland. 
I. Position and Course of Glands. 
The glands are normally three in number, one occurring in 
each septum of the trilocular ovary ; they are simple and 
extend almost throughout the whole length of the septum 
(Fig. 2). Each arises at a level only slightly above that at 
which the ovary-cavities make their appearance, and here 
forms a compact group of coherent cells, which however split 
apart almost immediately, and surround a central cavity, — 
the lumen of the gland. The lumen opens on to the external 
surface immediately below the base of the style (Fig. 2), and 
here the gland-cells which bound the lumen become con- 
tinuous with the epidermal cells of the external wall of the 
ovary. The short passage (leading on to the surface) in 
which this transition takes place may be conveniently termed 
the neck of the gland (Fig. 2, n.). In transverse section the 
glandular area has -roughly the form of an ellipse, the long 
