downwards, narrower tlian ttie casque, disk convex, edj^e de- 

 pressed, with a small .cinnamon spot at tlic top on tlie out- 

 side : label all white, biformed, untiividcd, unguiculated, 

 unguis 3 times as long as tlic l)lade or more, oblong and 

 .strai<i^ht-sided, sul)tubu!arly convolute, affixed to the foot of 

 the front of the column by a very shallow didymous pouch, 

 reseml)lini^ the heads of two very small studs; blade, shallov/ 

 ti-ansversely oblong, entire, with a scarcely perceptible point, 

 shallowly cordate at the base, smooth. Column wlilte, al- 

 most twice shorter tluin the corolhi, quite detached, nearly 

 upright, cylindrical at the lower part, upwards at the back 

 enlarged by a double protuberance, yellowish, polished, 

 depressed at the summit: anther lidshaped, permanent, of 

 two cells, with an oblong acuminated receptacle, tlic point of 

 which rests upon the beaksliapcd process that overhangs the 

 parallel slanted stigma : poUen-masscs 2, pale-yellow, pe- 

 dieled, chivate, composed of obversoly <>!>long angularly 

 pressed lobules collected round un elastic glutinous axis. 



D 2 



