1894.] Variation of North American Fishes. 649 
Table II presents all the combinations of dorsal spines and 
dorsal rays, and the number of specimens having the given 
combination. (But 76 of the specimens have been examined 
for this table.) The combinations are arranged in the numer- 
ical order of the spines from the lowest number to the highest. 
In the third column are given the per cents. of specimens hav- 
ing each combination. XV,15 is seen to be the commonest 
combination ; XIV, 16 the next, XV, 16 and XVI, 15 the next,’ 
and soon. The largest per cent. of any combination does not 
exceed 21.052. 
TABLE II. 
HE M 
r TE 
DORSAL FINS. 
BÉ A 
A 
XIII, 15 1 1.315 
XIII, 1€ 1 1.315 
XIV, 1: 2 2.631 
AV, i 6 7.895 
XIV, 12 15.789 
XIV T 1 1.815 
XV, 3 3.947 
XV, 16 1.05 
AV, 184i uode Bain. 11 14.47 
XV, 2 2.631 
AVL 14 I 1.315 
XVI, 15 9 11.841 
XVI, 16 1 1.315 
LVL It 1 1.315 
XVII,14 3 3.947 
XVII, 15 6 7.894 
In Table III are arranged the varieties in the number of 
-dorsal spines, the number of specimens representing each vari- 
_ation, and the per cent, of all the specimens for each variation. 
The average number of spines is 155, while the number of 
-spines predominating is 15. 
