American Fisheries Society 311 



size of a pin head. The formalin has bleached it out considerably and 

 it does not show as well as it would otherwise. There was another one 

 which in dissecting I cut half across, so that it does not show quite 

 so well. 



I show you now a section of a somewhat similar cyst except that it 

 was pinkish; is a 45-day growth, in the other it is from 23 to 28 days. 

 This is only an 11-day cyst; it is rather pinkish, instead of being yel- 

 lowish-brown, as the other one. Dr. Field kindly made these sections 

 for me, and I can only add, in explanation, that the cyst has a lining 

 which, I think, is epithelium. I have submitted it to some who believe 

 that while not absolutely typical epithelium, as it is very young, still it 

 is an epithelium lining of the cyst. 



