682 NOTES ON BVnLIS GIG ANTE A, LINDL., 



dried leaf, I saw the spiral lines very plainly. When mounted 

 in glycerine, they are still visible, but veiy faintly; and in spirit 

 they disappear completely. Among the glands on a dried speci- 

 men I saw a few with very small heads, not much larger than 

 the diameter of the stalk. These are probably young undeveloped 

 glands. Darwin says the heads of the glands are purplish, and 

 although I find no mention of it in my notes, I am under the 

 impression that I noticed this in examining the plant with a 

 hand lens. But in both dried and spirit specimens I find that 

 the heads are colourless and transparent. 



The sessile glands (figs. 4, 5 and 6) occur in I'ows down the 

 stem, leaves, etc., the rows being broken every 3 to 8 by stomata, 

 and at longer intervals by pedicellate glands (fig. 7, 2>9-)- The 

 heads are slightl}^ flattened spheres, sometimes with a slight pro- 

 jection on top (fig. 5), and are crimson in colour. Each row 

 occupies a shallow groove or channel formed by the epidermal 

 cells on each side of the row being larger in diameter; and where 

 a stoma or a stalked gland occurs, the channel divides and runs on 

 each side of it. The heads are peculiarly divided into sections 

 (fig. 6). They are 0*001 mm. in height and 0*003 mm. in 

 diameter. Darwin observes [loc. cit.) ihut the glandular hairs are 

 far more simple in structure than those of the other genera of 

 Droseracea^, and do not differ essentially from those borne by 

 innumerable other j^lants. They certainly do resemble the 

 glandular hairs found in Plumbago, Primula, and some of the 

 Verbenacepe. As before mentioned, both kinds of glands are 

 found on the flower-stalk and calyx, and are, if anything, more 

 plentiful on these than on the leaves. The plant does not in any 

 respect resemble a Drosera, and it is not at all to be wondered at 

 that some botanists are inclined to place it in another family (l). 



The stomata (fig. 8) occur on the stems and leaves, and are 

 0-003 mm. long and 0002 mm. wide, the orifice being 0-001 mm. 



In the paragraph from which I have already quoted, Darwin 

 says: — "As no instance is known of unicellular structures having 

 any power of movement, Byblis no doubt catches insects solely 

 by the aid of its viscid secretion. These probably sink down 



