BERNARD L. STREHLER 



387 



into them. After seeing the distribution of the acid phosphatase 

 granules, we re-examined some electron micrographs that we had 

 taken. We plan a much more systematic study of the degenerating 

 hydranths to see whether they contain structures reminescent of 

 lysosomes. In Figure 13, which illustrates a group of tentacles 

 at their point of attachment to the body wall, are some objects 

 which may be suitable candidates. They are certainly not mitochon- 

 dria which are also located in these very thin walls. 



Now, what can one say about the functional capacity of old 



N9 



^irT 



r' 



Fig. 13. Electron micrograph of a Campularia tentacle. Arrows indicate 

 possible loci of acid phosphatase activity. Magnification=about 4000X. 

 (From Strehler and Brandes, unpublished). 



