142 



radially, while the end of the cell that is towards the mouth of 

 the pitcher may slightly overlap the adjacent end of the next cell 

 within" (pag. 18), To this view I shall make a few additions. 



Fig. 12. N. Allardi. Section through the small corrugations. Lignification 

 pointed; a = prolongation of the adjacent epidermal cell. Adult pitcher. 



Fig. 8 shows a section parallel with the corrugations of a young pitcher 

 of N. mixta (stage of development corresponding to Fig, 4). The 

 pitcher was not quite open: The foremost part of the lid was free, 



and the collar was here partly 

 incurved to its final position, a 

 is corresponding to the outer 

 border of the collar. Here is 

 plainly seen the change from the 

 ordinary epidermal formation of 

 the outer wall to the corrugated 

 surface. The cells on this border 

 are prolonged, without having for- 

 med, however, any connecting 

 face ; the cuticle is here extremely 

 feeble. The nearer the cells are 

 placed to the inner border, the 

 more pronounced is the bending 

 towards the cavity of the pitcher 

 and overlapping of the adjoining 

 cells; a thick cuticle is here formed 

 on their upper part (Fig, 9), The prolongations overlapping the adjacent 

 cells are awl-shaped, and quite imbedded in the cuticle. They form 

 long continuous lines, which are seen as the low corrugations. On 

 the large corrugations they are much longer than in the valleys 



Fig. 13. N. Allardi. Section through 

 one of the large corrugations. Lignifica- 

 tion pointed a, h, c = prolongations. 

 Adult pitcher. 



