TROUT AND SALMON COMPARED. 129 



lower jaws are, I conclude, both males. The 

 salmon you see is broader, has a tail rather 

 more forked, and the teeth in proportion are 

 rather smaller. The trout, likewise, has larger 

 and more black brown spots on the body ; and 

 the head of the trout is a little larger in pro- 

 portion. The salmon has 14 spines in the 

 pectoral fins, 10 in each of the ventral, 1 3 in the 

 anal, 21 in the caudal, and 15 in the dorsal. 

 The salmon measures 38j inches in length, and 

 21 inches in girth, and his weight, as you see, 

 is 22;^ lbs. The trout has one spine less in the 

 pectoral, and two less in the anal fin, and 

 m€asures 30j inches in length, and 16 inches 

 in girth, and his weight is 1 1 lbs. We will now 

 open them. The stomach of the salmon, you 

 perceive, contains nothing but a little yellow 

 fluid, and, though the salmon is twice as large, 

 does not exceed much in size that of the 

 trout. The stomach of the trout, unlike that 

 of the salmon, will be found full of food : we 

 will open it. See, there are half digested 

 sand eels which come out of it. 



Phys. — But surely the stomachs of salmon 

 must sometimes, when opened, contain food ? 

 K 



