194 



MONACHANTHUS VIEIDIS. 



Chap. Vll. 



C. saccatum. In other respects there is no important 

 difference. The antennae are of greater length ; their 

 tips for ahout one-twentieth of their length are 

 roughened by cells produced into papillaa. 



Fig. 30. 



Catasetum tmdentatum. 



0. anther. 



pd. pedicel of pollinium. 

 an. antennse. 



1. labellum. 



A. Side view of flower in its natural 



position, witli two of tlie sepals 

 cut off. 



B. Front view of column, in position 



reverse of fig. A, 



The pedicel of the pollinium is articulated as before 

 by a hinge to the disc ; it can move freely only in one 

 direction owing to one end of the disc being upturned, 

 and this restricted power of movement apparently 

 comes into play when the pollinium is carried by an 

 insect to the female flower. The disc is, as in the other 

 species, of large size, and the end which when ejected 

 first strikes any object, is much more viscid than the 

 rest of the surface. This latter surface is drenched 

 with a milky fluid, which, when exposed to the air, 

 rapidly turns brown, and sets into a cheesy consistence. 

 The upper surface of the disc consists of strong mem- 



