Insectivorous Plants ( Part II). 457 
Fig. 15. Transverse section of pedicel of Nepenthes bicalcar ata with triradiate 
honey-gland, x 350. 
Fig. 16. Vertical section of attractive perithecioid honey-gland from inner lid- 
surface of Nepenthes Lowii ; letters as before. 
Fig. 17. Surface view of attractive perithecioid honey-gland from inner lid- 
surface of Nepenthes Pervillei. x 75. 
Fig. 18. Surface view of honey-gland from pedicel of Nepenthes Pervillei. x 75. 
Fig. 19. Transverse section of one-half of sepal from Nepenthes bicalcarata , with 
honey-glands (g) embedded in depressions of the upper epidermis. X 75 * 
Fig. 20. Surface view of last, x 350. 
Fig. 21. Surface view of margin of corrugated rim from Nepenthes Hookeri after 
maceration in potash solution and removal of upper epidermis and mesophyll to 
the line c. One gland-bundle a, has been left ; b, exposed surface of gland ; 
d, orifice of gland, x 75. 
Fig. 22. Vertical section of corrugated rim from Nepenthes khasyana : a , gland- 
bundle ; b, sausage-shaped gland deeply sunk in an involution of the margin, of 
which d is the orifice ; e, oblique stomata (‘ transverse excrescences ’ of authors) on 
conducting surface. X75. 
Fig. 23. Transverse section of corrugated rim of N. khasyana'. a , corrugations; 
b, bundles traversing these ; c, periglandular bundles ; d, gland-tissue ; e, lumen 
formed by separation of central gland-cells, x 150. 
Fig. 24. Section of a marginal tooth from Nepenthes echinostoma exposing 
marginal gland at the apex, x 5 . 
Figs. 25-28. Sections of corrugated margin to show comparative size of glands 
in species. Fig. 25, N. Rafflesiana\ Fig. 26, N zeylanica ; Fig. 27, N Phyllam- 
phora\ Fig. 28, N. villosa. X25. (P. W. Nicol delt.) 
Plate XXI. 
Fig. 29. Surface view of corrugated rim from seedling-leaf of Nepenthes 
edinensis. x 75. 
Fig. 30. Vertical section of corrugated margin from young pitcher of Nepenthes 
hybrida, showing rudiment of marginal gland developing in a depression of the 
epidermis, x 350. 
Fig. 31. Vertical section of pitcher-wall of Nepenthes khasyana'. a , alluring 
gland ; b, one of the external vascular bundles from which a diverticulum for gland- 
supply has been given off; c, ‘peptic’ gland; d, one of the internal vascular 
bundles from which diverticula pass to the ‘ peptic ’ glands, x 1 50. 
Fig. 32. Vertical section of inner pitcher-wall of Nepenthes Veitchii, showing 
* peptic ’ glands lying in depressions formed by flap-like outgrowths of tissue 
lying above each, x 75. 
Fig. 33. Surface view of detentive region from Nepenthes sanguinea, with three 
‘ peptic ’ glands slightly covered by flaps and supplied by vascular tissue left after 
removal of mesophyll tissue by maceration, x 75. 
Fig. 34. Surface view of detentive region from Nepenthes Pervillei, with ‘ peptic ’ 
glands deeply sunk in funnel-shaped pockets. X 75. 
Fig. 35. Surface view of detentive region from Nepenthes Lowii. x 75. 
