163 THE BIOLOGY OF HYDRA : 1961 



been studying different animals with different approaches. As time 

 passes I become more impressed by the variabiHty between closely 

 related animals. 



PHILLIPS: Have you detected any hexosamines or uronic acids 

 in the capsule? 



KLINE: We have not looked for them. 



STREHLER: What percentage of the total weight did you calcu- 

 late would be collagen on the basis of this hydroxyproline 

 content? 



KLINE: Based on 20% hydroxyproline, the collagen-like protein 

 represents about 10% of the total protein of H. littoralis. 



