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148 ILLINOIS ACADEMY OF SCIHNCE 
According to current descriptions, boscii differs from cryso- 
leucas in the larger scales; in the brighter colors of the breed- 
ing male, ad in the greater length of the anal fin. The varia- 
tion to which these characters are subject has been studied in 
some detail. 
1. The Size of the Scales 
In 56 counts of the number of transverse rows of scales in 
specimens of boscii from Florida and South Carolina, an ex- 
treme variation of from 42 to 53 rows was found, the mode of 
variation being about 46 rows. In 127 counts of the transverse 
scale rows of specimens from the given range of crysoleucas 
proper, the mode of variation is at 47 rows instead of 46; the 
extremes of variation (from 42 to 53 rows) as determined for 
boscii, were found to hold also as the usual extremes for typical 
crysoleucas, although two specimens showed a higher number 
(in one case 55, in the other 57, on one side only). These fig- 
ures indicate that there is no wide geographical variation in the 
size of the scales of Notemigonus crysoleucas. 
In both crysolucas and boscii the lateral line is frequently 
variously incomplete. 
2. The Colors of the Breeding Male 
In the southeastern form, boscii, the males in the spring 
are described as assuming bright colors, caused chiefly by the 
development of red color on the lower fins. In typical eryso- 
leucas, however, the lower fins are usually marked with orange 
in the breeding fishes (of both sexes), and these fins are occa- 
sionally red.* o data is available on the intergradation of the 
two forms in respect to coloration. 
8Dr. Tar'eton Bean (Bull. Am. Mus. Nat. Hist., 9, 1897, p. 344) described as a race of 
crysoleucas, a fish from Central Park, New York City, characterized by the ‘‘permanent ver- 
milion color’ of the lower fins. Hk apparently was dealing however with examples of an in- 
troduced European species, Scardineus erythrophthalmus. 
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