— 144 — 



the real conducting surface in this species seems to me a little erron- 

 eous. He says: "The conducting surface, represented by a narrow 

 glabrous band internally at the top of the tube, is functionless, 

 and small digestive glands thickly cover the whole inner cavity", 

 (pag. 421). No doubt small digestive glands cover almost all 

 the inner pitcher-wall, beginning close at the spot where the collar 



rises, and the conducting surface Uke- 

 wise is functionless, but, stretching 

 however over the lower surface of the 

 inner part of the collar, it isnotlimited 

 to a narrow band at the top of 

 the tube (6 — c, Fig. 6). There seems to 

 exist a sort of correlation between the 



extension in depth of the conducting 

 Fiff. 16. N. Mastersiana. Siomata „ i .i • x- j.i • i 



f\, . ., f.v, ,1 ct surface and the size of the mner part 



of the inner side of the hd. Stage ^ 



of development: Fig. 3. of the rim, a correlation of which N. 



gracilis and N. am2Jullaria are here 

 taken as types. In the former the growth at h (Fig. 7) is greatly 

 limited, and the conducting surface stretches along the inner pitcher- 

 wall, whereas in the latter an important growth at h forces the 

 conducting surface out on the lower side of the incurved rim. 



Unquestionably the constitution and development of the collar 

 in the various species must be taken into account, when the genealo- 

 gical connection of the Nepenthes-s^ec\es shall be traced, as Mac- 

 far lane has done; but I do not think that he is quite right in 

 regarding the collar of N. ampuUaria as a more primitive form 

 than that of N. gracilis. 



Copenhagen, 17. April 1909. 



Resume. 



I. Kravens Udvikling eg Morphologi. 



A. To fejlagtige Meninger om Kravens Udvikling er tidligere anfert: 



a. Hele den rillede Overflade skulde svare til Kandens oprindelige 

 Rand, som under Vaeksten blev fladet ud. (Macfarlane (11) 1889). 



b. Den oprindelige Rand skulde findes, forsynet med Randkirtler, i 

 Kravens indadbojede Del, og den udadbejede Del fremkom da ved 



