141 



smaller corrugation, shaped in a 

 peculiar manner. All this exceed- 

 ingly combinated surface reflects 

 the light looking, as if it were 

 covered with honey. In connexion 

 with the colours of the rim this 

 circumstance perhaps may serve to 

 allure the prey. The great corruga- 

 tions have been explained by 

 Wunschmann (14) in a more sur- 

 prising than correct fashion. 



He says: "Gharakteristisch fiir 

 den Habitus der Becher sind auch 

 noch die Rander ihrer Miindungen. 



Hier namlich treten die Gefassbiindel aus dem Parenchym des 

 Bechers hervor und bilden den geringelten Saum der Bechermiindung, 



Fig. 8. N. mixta. Section parallel 

 with the corrugations of a young 

 collar, a = the outer border of 

 the collar. The stage of development 

 is corresponding to that in Fig. 4. 



Fig. 9. 1 N. mixta. Section parallel 



with the corrugations in the middle 



of the collar. Cuticle removed. Stage 



of development: Fig. 4. 



Fig. 10. N. mixta. Vertical section 



through the small corrugations. Cuticle 



pointed, a, b = prolongations; stage 



of development: Fig. 4. 



^-c 



Fig. 11. N. mixta. Vertical section 

 through the large corrugations. 

 Cuticle pointed, a, b, c = prolon- 

 gations of the three adjacent cells. 

 Stage of development: Fig. 4. 



der bei den verschiedenen Arten 

 in verschiedenen Modificationen auf- 

 tritt" (pag. 7). Macfarlane has 

 already in 1893 given a figure of 

 the large corrugations, and later 

 on, in 1908, he has made a further 

 short remark on the epidermal 

 cells of the corrugated part: "The 

 corrugated surface of the peristome 

 consists of highly cuticularized epider- 

 mal cells arranged in radial rows, 

 and neatly fitting into each other 

 by oblique walls. The surface of 

 each cell is delicately striated 



