45 6 Macfarlane . — Observations on Pitchered 
DESCRIPTION OF FIGURES IN PLATES 
XIX, XX, AND XXI. 
Illustrating Dr. J. M. Macfarlane’s paper on Pitchered Insectivorous Plants. 
Plate XIX. 
Fig. i. Vertical section ot Darlingtonia pitcher, showing gland-cells. In one 
of the adjoining cells only are the chloroplasts represented, x 350. 
Fig. 2. Surface view of last. X350. 
Fig. 3. Surface view 7 of pitcher-rim, showing three surface gland-cells, surrounded 
by epidermal cells with downward-directed processes, x 350. 
Fig. 4. Vertical section of last. X350. 
Fig. 5. Semi-diagrammatic view of the inner pitcher-wall of Sarracenia 
variolaris ; a, attractive surface ; b, conducting surface ; d, detentive surface. 
a', single hair-cell from attractive surface ; b' , single hair-cell from conducting 
surface ; d' , single hair-cell from detentive surface. 
Fig. 6. Semi-diagrammatic view of the inner pitcher-wall of Sarracenia pur- 
purea ; c , glandular surface ; other letters as in last. 
Fig. 7. Semi-diagrammatic view of the inner pitcher-wall of Heliamphora 
nutans ; a, attractive surface ; b, upper conducting surface ; c, lower conducting 
surface ; d, detentive surface. 
Fig. 8. Two honey-glands from attractive surface, surrounded by thick-walled 
neighbour-cells, x 350. 
Fig. 9. Glands and hair-cells from middle of area b of Fig. 7. x 350. 
Fig. 10. Gland from external surface of sepal, x 350. 
Fig. 11. Transverse section of outer ovarian wall of Sarracenia purpurea , 
showing nectariferous papillae, x 75. 
Fig. 12. Transverse section of alluring stem-gland of Nepenthes Phyllamphora ; 
a, columnar gland-cell layer with two subjacent layers of polygonal gland-cells ; 
b, basement-membrane of gland, formed of two cell-layers; c, vascular bundle 
giving off a diverticulum d, which ends in the base of the gland ; e, cut ends of 
spiral cells, x 350. 
Plate XX. 
Fig. 13. Vertical section of alluring leaf-gland of Nepenthes hybrida ; d, terminal 
bundle-cells connecting with cells of the subglandular membrane ; other letters as 
in last. X350. 
Fig. 14. Surface view of alluring gland from tendril of Nepenthes bicalcarata. 
The epidermal cells above the gland-cavity are thick-walled, and show sudden 
transition to the ordinary epidermal cells, x J 50. 
