492 



Annals New York Academy of Sciences 



C 



Figure 5. I'^ffect of digital pressure on microspheres. Size as in figure 2. 



■k^ "'•-%; 



3»g' 



^^c^"^^ 



-^-r 



-2X 



Figure 6. Associations of microspheres with resemblance to algae. Size as in figure 2. 



