74 



Prof. Goode. — The remarks just made are exactly what 

 we want, observations of men who have Hve fish under their 

 eyes all the year round. That blind trout turned black is a 

 new thing to me. 



Mr. Mather. — This is a thing that is so familiar that I 

 would not think of mentioning it ; but for what Prof. Goode 

 said in his paper I supposed that everybody knew it. I would 

 as soon have thought to tell this Association that fishes live 

 in the water. 



Col. McDonald. — I must differ with Mr. Mather on the 

 subject of blind trout always turning black. At Wytheville, 

 Virginia, we placed some rainbow trout fry in a trough that 

 had been recently coated with asphalt, and the coating was 

 not dry. The fry went blind, but instead of turning black 

 they changed to white. 



Mr. Mather. — Did they live } 



Col. McDonald. — There were originally some six or eight 

 hundred of them, and they lived for several years. I believe 

 that some of them are alive yet, but they were white. 



Dr. Kingsbury. — In my salmon fishing excursions I have 

 frequently seen salmon which were blind, and these were 

 invariably black or very dark. 



Mr. Mather. — The trout that Col. McDonald speaks of as 

 turning white, when blind, were the itidcns or rainbow trout. 

 I do not remember to have seen a blind fish of this species. 

 When I said "trout," I meant our Eastern brook trout, 5. 

 pontinalis, therefore it is possible that neither of us have 

 erred in our observations, as we have been talking about two 

 different species. 



Mr. Powell. — In parts of Pennsylvania it might be pos- 

 sible to profitably breed the fresh-water terrapin. Many of 

 them are caught and sold, therefore they have a market value, 

 and as the demand exceeds the supply, an increase of terra- 

 pins would mean an increased revenue. 



Mr. Mather. — While the particular species of fresh-water 

 terrapin, mentioned by Mr. Powell, is not designated, it may 



