i6o 



THE PLANTS 



of the finer specimens will adhere sufficiently to paper, 

 but the coarser ones must be afterwards fastened on 

 to the mount with narrow straps of gummed paper. 

 We have already said that blue algae must be spread 



FIG. 74. PRESS FOR DRYING ALGJE. 



FIG. 75. ARCH^EOLITHO- 

 THAMNIUM. 



FlG. 76. LlTHOPHYLLUM. 



out at once after having been collected. It is best to 

 let them dry in the air. Each specimen should be 

 provided with a label, on which must be mentioned 

 the locality where it was collected, the date, the nature 



