RICHARD L. WOOD 



55 



membranes. The intercellular space is thereby divided into a series 

 of compartments. 



From examination of oblique or longitudinal sections of these 

 desmosomes it is clear that the intercellular connections are not 



\ 



33t^ 



O 



\ 



y9i 



Fig. 2. Low magnification electron micrograph of Chlorohydra. The epi- 

 dermis is at the top and the gastrodermis at the bottom. Zoochlorella appear 

 in the gastrodermal cells. Cross sections of muscle fibers lie adjacent to the 

 mesolamella in the epidermis. Desmosomes are apparent in both the epi- 

 dermis and the gastrodermis (arrows). Specialized muscle-to-muscle attach- 

 ment is indicated by increased densities such as at the small circle. Note the 

 large intracellular vacuoles in both epithelial layers. V, intracellular vacuole. 

 2700X. (Originally published in J. Biophysic. and Biochem. Cytol., 6: 

 343-352, 1959). 



