404 Macfar lane— Observations on Pitcher ed 
devoid of them, at least inside the pitcher. The great 
complexity of the glands in Nepenthes , as contrasted with 
their comparative simplicity in the first three, more than 
compensates that genus for the absence of hairs. In de- 
scribing the minute structure of the pitcher-surfaces I will use 
the expressive terms £ attractive , 5 ‘ conducting , 5 ‘ glandular , 5 
and £ detentive , 5 applied to these by Sir Joseph Hooker in his 
Presidential address 1 to the British Association at Belfast. 
But, as I have already shown 2 , external honey-glands are 
scattered over the leaves and even the stem in all the genera, 
forming an alluring or baited pathway for insects. I propose 
to speak of these as c alluring glands/ and an area provided 
with them as an £ alluring surface . 5 Further, in view of the 
interesting researches of Hunt and Dickson on the glands of 
the corrugated rim of Nepenthes 3 , and observations of my 
own as to their function, the term £ attractive 5 as applied to that 
genus will be extended so that we» may speak of c attractive 
lid-glands 5 and ‘attractive marginal-glands/ 
Darlingtonia. In this genus alluring glands occur over 
the entire outer pitcher-surface, and are not more abundant 
on the dorsal wing than elsewhere. When microscopically 
examined, they are circular or oval in outline (Plate XIX, 
Fig. 2) ; they appear to be, and have hitherto been de- 
scribed as being, one-celled 4 , and their margin often shows 
a concentric ragged-looking line caused by the free edge 
of the cuticle, which is not continuous over the gland-surface. 
When vertical sections are made, each surface gland-cell 
is seen to be the uppermost of four (rarely five or six) 
sunk in the tissue of the leaf, the three upper being shallow 
and having thin transverse septa, while the lowest is large 
and goblet-shaped (Plate XIX, Fig. 1). The cell-contents 
have a dense finely-granular aspect, and are slightly yellow in 
1 Report Brit. Assoc. 1874. 
2 Nature, Dec. 25, 1884. 
3 Proc. Phil. Acad. Nat. Sc. 1874; Gardener’s Chronicle, 1883. 
4 Zipperer, Beitrag zur Kenntniss der Sarraceniaceen, Munich, 1885. Goebel 
confirms my account. 
