EESBARCHES ON PROTOPLASMIC CONTINUITY. 319 



dermal cell of Ilex aquifolium presents a case in point. I 

 used in this investigation one of Zeiss No. 1 microscopes, 

 Oculars 2 and 4, Objectives D and F, and a microscope of 

 Hartnack's with two very excellent Objectives, No. 10, and an 

 Immersion, known as "Foyer 1 m/m"(No. lo ?). Oculars 

 2 and 4. 



