open. In this respect we find almost the same structure for 

 Orchidacese as we have in Aconitum among Rammculaceae. 



Comparettia consists at present of this and two other 

 species inhabiting trees in Peru. Of these C. falcata ap- 

 proaches the present subject in many respects. It, however, 

 appears to differ in having broader leaves, larger flowers, no 

 elevated plate at the base of the stigma, and the spurs of the 

 lip smooth. 



Fig 1. represents the pollen-masses, with their caudicula. 

 Fig 2. is a view of the column and spurs, all the sepals and 

 petals being cut off; a. is the elevated plate below the 

 stigma ; b. shews the lamellae at the base of the lip; c. re- 

 presents the labial spurs, a little pulled out of the sepaline 

 spur d. 



