— 138 



a—c and the inner side of the hd are covered as in the younger 

 pitchers. Numerous spiral cells with a fully developed spiral fibre 



are found. The fibre gives here, as in 

 the adult plants, reaction of Cellu- 

 lose with Ghlorzink of Iodine, 

 a fact already stated by Kny 

 and Zimmermann (10). The 

 vascular bundles, studied in details 

 byZacharias(15), are surrounded 

 by a sheath, filled with Amylum, 

 which probably yields material to 

 the later developed sclerenchyma- 

 cortex around the bundles. Young 

 stages of lid glands, with their 

 flaps, are seen here, and stomata 

 occur dispersed all over the inner 

 side of the lid. The surface a~b 

 is yet uncorrugated, whereas the 

 first trace of marginal glands has 

 appeared. 



The swelling, bearing them, 

 is of the largest extension between 



Fig. 4. N. mixta. The pitcher was 



but half open. Section through the 



incurved part of the collar. 



them, on the spots where 

 the teeth are formed 

 later on. 



In the stage shown 

 i Fig. 4 (iV. mixta) all 

 the organs of the adult 

 pitcher are developed and 

 nearly qualified to func- 

 tion. The time chosen, 

 was when the pitcher 

 was but half open, and 

 the section was laid 

 through the part of the 

 collar, which was yet 

 incurved. When the lid 

 rises and uncovers the 

 pitcher orifice, the outer 

 border of the collar a 



Fig. 5. N. ampullaria. Young stage, d = scleren- 

 chyma; Ig = attractive gland of the outer lid- 

 surface. 



