EXPLANATION OF THE ILLUSTRATION 
Pirate V. PLEUROTHALLIS ANGUSTIPETALA C. Schwein- 
Jurth. 1, plant, one half natural size. 2, flower ex- 
panded, three and one half times natural size. 8, 
column and lip from side, natural position, three 
and one half times natural size. 
Drawn by E.mer W. Siri 
