ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
G97 
series is almost impossible. For his work on Psilura rnonacha L., in 
order not to have to give up the use of the convenient Cathcart micro- 
Fig. 111. 
Fig. 113. 
tome, ho has devised two section-stretchers which have been made by 
the firm of Eeichert and have proved very serviceable. 
