14 



the fin behind the vent nine rays ; in this respect the resemb- 

 lance is to the brook trout, but the difference from the rain- 

 bow is slight. The height of the body is about one-fifth of 

 the length excluding the tail, and the length of the head 

 about two-ninths. The large back fin and the fin behind the 

 vent are higher than in the brook trout and more nearly like 

 the fins of the rainbow. . 



The coeca at the pyloric end of the stomach are fewer in 

 number than in both of the reputed parent species. The re- 

 productive organs are short and thin, the sex not discernible, 

 which is the usual condition in hybrids of this kind. The air- 

 bladder is very large, nearly as long as the abdominal cavity. 



This is a graceful and active fish and one that is worthy of 

 the attention of fish culturists. Our examples were so full of 

 life that some of them jumped out of the aquarium. Under 

 favorable circumstances, if the cross continues to exhibit 

 sterility, it should grow rapidly and reach a great size. 



If any of the readers of The American Angler can furnish 

 information about the fish here described or about experiments 

 in hybridizing species of the salmon family, it will be received 

 with much interest." 



Cross Between Lake Trout and Brook Trout. 



The Pennsylvania Fish Commission has been experiment- 

 ing for some years, at the Corry station, with hybrids between 

 the lake trout, salvelinus namaycnst, and the brook trout sal- 

 velinns fontinalis. A very brief account of the experiments 

 is to be found in the report of that commission for 1886. 

 Some fine specimens of these artificially produced hybrids 

 have been received by the United States Fish Commission. 

 A large one measuring about twenty inches in length is ap- 

 parently a male as the lower jaw has a small cartilaginous tip. 

 The end of the maxilla extends behind the eye a distance 

 nearly equal to the length of the snout. The scales are larger 

 than in the brook trout and about equal in size to those of the 

 lake trout. The caudel is deeply forked, about as deeply as 



