244 



Plate XV. 



Pterostylis mitchelli. 

 Fig. 1. Labellum and claw from above. 



2. ,, ,, side view. 



3. ,, ,, under-surface. 



4. Column from the side. 



5. ,, ,, front. 



6. ,, ,, ,, with the membranous wings re- 

 moved, showing the vertical 



channel between the stigma 

 and rostellum. 



P. rufa. 

 Fig. 1. Side view of labellum and claw; ap = the appendage. 

 ,, la. Diagrammatic drawing to show how the appendage in 

 this species is developed as a transverse fold at the 

 base of the lamina, the dotted margins of the fold 

 fusing together, so as to form a solid eminence; 

 ap=the appendage. 



2. Upper-surface of labellum and claw. 



3. Lower-surface of the same. 



4. Column from the side. 



5. ,, ,, front. 



6. ,, ,, j, the membranous wings removed 



so as to show the vertical 



channel communicating be- 

 tween stigma and rostellum. 



P. squamata. 

 Fig. 1. A side view of the labellum. 



2. Labellum from the top. 



3. ,, ,, below. 



4. Column ,, the side. 



5. ,, ,, the front. 



6. Another view of the front of column, with the mem- 

 branous wings removed. 



