Insectivorous Plants (Part II). 429 
alluring glands always appear earlier than the lid-glands, 
as a few may be encountered on the fifth-eighth leaf, while the 
lid-glands are absent until the ninth-twelfth foliage-leaf has 
appeared. They are distributed in each species to a varying 
extent over the stem, petiole, mid-rib, under laminar surface, 
tendril, outer pitcher and lid surfaces. After examination 
of all the species, extremely few have been found on the 
upper laminar surface, except in three species soon to be 
touched on, and there are evident reasons for this. It may 
be laid down as a general rule that they increase in number 
as one passes from stem to outer pitcher-surface, and on the 
latter they are most abundant along the dorsal wings and 
near the pitcher-orifice. In Veitckii , while abundant on 
the under laminar surface, they are densely set at the base 
of the petiole as if to tempt insects to pass from the stem to 
the leaf. This is also true to a great extent of N. Northiana . 
The deviations which they show from the simple flat type 
already described are highly interesting. When placed on the 
outer surface of the lid or pitcher they much resemble attractive 
lid-glands, with the addition that a covering flap of epidermal 
tissue varying in extent grows over them, or more commonly 
even, like certain attractive lid-glands (N. Lowii , N. laevis , 
N. Pervillei ), they are so encircled and closed in by the epider- 
mal covering that the gland becomes ‘ perithecioid * (PI. XX, 
Figs. 1 6, 17), and the sugary secretion exudes from a small 
circular orifice of the epidermis. On tendrils and on the under 
surface of the lamina the perithecioid form is characteristic, 
and it attains its most gigantic proportions on the tendril of 
N. bicalcarata , where, owing to rapid growth of the tendril, 
the gland-orifice becomes slit-like (PI. XX, Fig. 14), and the 
gland-tissue may be one-eighth of an inch in length and one- 
sixteenth part of an inch in width. 
On the stem still greater modification occurs. In PI. XIX, 
Fig. 12, a section is represented taken from the stem of N. 
Phyllamphora. Here the gland-tissue has become deeply 
and sharply involuted ; a lumen, spindle-shaped below, 
constricted above, and again widening, opens by a small 
