American Fisheries Society. 317 



Mr. Xevin : We have had quite a number in our pond, and 

 they never bred. 



Dr. Bean : Pennsylvania has bred many of them and got 

 eggs from them. 



Mr. Thompson : Some of the European culturists advertise 

 hybrids 7-S — that wouht indicate two crossings with the hybrid. 



Dr. Bean : I believe the rule so far as known is this, where a 

 small-scaled fish of the salmon family is crossed with a large- 

 scaled fish, the cross is never fertile, but if a large-scaled fish is 

 interbred with a large-scaled and a small-scaled with a small- 

 scaled fish, within the limits of the genus, the cross is always 

 fertile. 



Mr. Nevin: There is no cross between the brown trout and 

 the brook trout? 



Dr. Bean : , No, because the brook trout is small-scaled. The 

 scales are so small that many people think they have no scales, 

 and the brown trout is a large-scaled fish. 



Mr. Waterhouse: Is that a matter of theory or settled by 

 experiment ? 



Dr. Bean : Settled by experiment. 



I 



