Chap. I. OKCHIS PYKAMIDALIS. 19 



Description of Fig. 3. 



a. anther. 

 s,s. stigma. 

 /. rostellum. 



L labellum, 



I', guiding plate on the labellum. 



n. nectary. 



A. Front view,, with all the sepals- and petals removed, except the 



labellum. 



B. Side riew, with all the sepals and petals removed, with the labellum 



longitudinally bisected, and with the near side of- the upper part 

 of the nectary cut away. 



C. The two poUinia attached to the saddle-shaped viscid disc. 



D. The disc after the first act of contraction, with no object seized. 



E. The disc seen from above, and flattened by force, with one poUinium 



removed ; showing a depression in its surface, by which the second 

 movement of the pollinium is effected. 



F. The pollinia removed by the insertion of a needle into the nectary, after 



the saddle has clasped the needle by the first act of contraction. 

 6. The same pollinia after the second movement and their consequent 

 depression. 



