182 MICEOSCOPIC FUNGI. 



date and locality^ to wLicli^ after microscopical 

 examination, the name may be added. When 

 thoroughly dry, your leaves may be preserved for 

 reference in old envelopes, with the particulars 

 endorsed on the outside. Fungi on leaves will 

 generally be examined to the greatest advantage 

 in the fresh state, but if too much pressure is not 

 employed in the drying, it will not be difficult even 

 in that condition to make out their characteristic 

 features. Care must be taken, by changing their 

 position, that moulds of other kinds do not es- 

 tablish themselves upon the specimens in drying, 

 or that when dried they do not fall a prey to Euro^ 

 tiiim Jierhariorum. 



If it is intended to add these leaves to your 

 herbarium, or to form a special herbarium for them, 

 they should be mounted on white paper, first by 

 affixing one or two leaves by means of thin glue 

 to a paper about four inches square, on which the 

 name, date, and locahty may be written, and 

 attaching several of these species-papers to a larger 

 or ^em/s-paper, or by devoting each larger paper 

 to a species, adding in future other varieties, and 

 enclosing all the sj:)ec{es-papers of the same genus 

 within a folded sheet, on which the name of the 

 genus is written. • 



We have adopted, for our own herbarium, the 

 " foolscap '' size. A sheet of paper receives within 

 its fold the specimens of a single species ; these 

 are affixed to the right-hand page, when the sheet 



