— Plate 24. — 



Fig. I. — Utricularia gibba. View looking into the entrance showing the I 



velum. X 50. ^ 



Fig. 2. — U. caeridea. Trap before {left) and after actuation. Note the / 



changed door profile. | 



Fig. 3. — U. monanthos, trap before {left) and after actuation. 1 



Fig. 4. — View looking into the entrance of U. dichotoma, showing the \ 



circular outer velum. Ca. 40 x. 



Fig. 5. — U. capensis. Trap before {left) and after actuation. \ 



Fig. 6. — Transverse section of the threshold of U. cornuta, showing the 'i 



velum. ' 

 Fig. 7. — U. Welwitschii. The tripping hair. 

 Fig. 8. — Polypompholyx miiUifida. Trap entrance before {above) and 



after actuation. j 



Fig. 9. — Inner surface of the door of U. gibba, showing the concentric 1 



sulci. Note that in the upper part of this illustration the anticlinal i| 



walls appear constricted, this being artifact. t 



) 

 I 



I 



J 

 I 



I 



i 



