FOURTH DAY.] TROUT AND SALMON COMPARED. Ill 



largest trout with a salmon. I have selected two 

 fresh run fish/ which, from their curved 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 

 proportion. The salmon has 14 spines in the pectoral 

 fins, 10 in each of the ventral, 13 in the anal, 21 in 

 the caudal, and 15 in the dorsal. The salmon mea- 

 sures 38| inches in length, and 21 inches in girth, 

 and his weight, as you see, is 2 2 Jibs. The trout has 

 one spine less in the pectoral, and two less in the anal 

 fin, and measures 30J inches in length, and 16 inches 

 in girth, and his weight is lllbs. 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 ? 



HAL. I have opened ten or twelve, and never 

 found anything in their stomachs but tape-worms, 



* See Vignettes, p. 83. 



