LICHENS AND THE NATURALIST. 69 



suitable sizes. Take one of the rectangular pieces 

 and fold it from the bottom to within an inch of the 

 top ; turn down the top one incli, so that the upper 

 flap folds over the lower flap ; now turn the sides under 

 (or back) for a space of one inch, crease the edges 

 well and the pocket is complete. It will, of course, 

 be necessary to have assorted sizes of pockets, to suit 

 the sizes of the different specimens ; but do not make 

 too many different sizes, three will, perhaps, be enough 

 for all practical purposes. These pockets, with the 

 specimens, may be glued on the mounting sheets or in 

 the scrap-book ; in which case the label is pasted on 

 the outside of the lower flap. If the specimens are in- 

 tended for exchange the labels should be placed on the 

 inside with the specimen and not glued, so as not to 

 inconvenience the one with whom you are making ex- 

 changes, should he desire not to mount them with the 

 pockets. It must also be remembered that many crus- 

 tose soil-lichens and some of the smaller fruticose 

 forms can only be kept in pockets or boxes. There 

 are also other styles of pockets than the one here de- 

 scribed ; perhaps the reader will invent a better and 

 more convenient form. 



Every specimen should be labelled ; in fact, a speci- 

 men without a label is of little value from a botanical 

 point of view. The label ghould be of sufficient size 

 for the following data : Name, where collected (give a 

 recognizable geographical locality), elevation, date 

 when collected, and the name of the collector. Labels 

 should either be printed, or written with pen and ink. 

 If labels are not at hand write the above items on the 



