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IV. DO THE BROODS OF ONE SEASON DIFFER FROM THE BROODS OF 
ANOTHER SEASON? 
The different broods could be clearly separated only in Etheostoma caprodes. 
A series of 565 specimens from Turkey Lake taken during the summer of ’95 were 
readily separable into three groups on the basis of their size. These three groups 
represented the broods of ’93, ’94 and ’95. These are the broods contained in 
Table 1. The comparison of the broods has already been made (Proc. Ind. Acad. 
Sci. No. 5, pp. 289-96, 1895), but the following points seem worth repeating in 
this connection. 
1. The broods of ’93° and ’95° were alike in all the structures examined. 
2. The brood of ’94° differed from the other two broods in having on an ay- 
erage two more scales in the lateral line, and a fewer number of dorsal spines. 
Fiegs3; 
In Fig. 3 are given the curves for the dorsal spines of these three broods. 
The curves are based on the counts for the dorsal spines given in Table I. The 
continuous line is for the broods of ’93°, the broken line for the broods of ’94° and 
the dotted line for the broods of ’95°. 
