American Fisheries Society. 201 



Mr. Marsh: Unless the air in the spring bubbles up from 

 ihe bottom and presumably from quite a depth. 



Mr. i^evin: There is probably nine feet of water in the 

 pond. 



Mr. Titcomb : Are there springs in the pond ? 



Mr. Nevin: Yes, sir. 



Mr. Marsh : Is there bubbling of gas all the time ? 



Mr. Nevin : No. 



Mr. Marsh : If that water could take up air only from the 

 surface I do not see how it could get an excess. Is there any agi- 

 tation in the water ? 



Mr. Xevin : Xo, none at all. 



Q. Do the bubbles adhere loosely to the fish? 



A. Yes. 



Q. Can you see the bubbles in the water ? 



A. Xo, not loose in the water — I noticed them on the fish in 

 the aquarium also. 



]\Ir. Marsh : Those bubbles may not be due to excess — it may 

 be an entirely different matter — I do not see how in this case 

 there could be an excess of air. 



Dr. Bean : I would like to ask whether a paper on this sub- 

 ject was not published in the Transactions, growing out of inves- 

 tigations on Long Island — ^a paper about two or three years ago, 

 based on some observations at Cold Spring Harbor. 



Mr. Marsh : In the fisheries transactions ? 



Dr. Bean : They are in the Fisheries Society's publication or 

 in a Bulletin of the Fish Commission — I think I have seen a 

 paper of that kind on the gas bubble disease. 



j\Ir. Marsh : Yes, in the bulletin of the fish commission, and 

 Prof. Gorman, the author of the article, is present tonight and 

 perhaps may mention it. In that article he refers to the pop- 

 eyed scu]i at Woods Hole, and there are specimens of them in 

 the aquarium liere now. As I said, that popeye I did not see 

 here in the winter. The popeye that they have in the summer 

 may be due to the same cause and may not — I do not know. 

 Prof. Gorham's explanation was one of reduction of pressure, the 

 scup having been taken from dee]) water and put in shallow 

 aquaria. If there is a little gas in the tissue behind the eye it 



