650 The American Naturalist. [August, 
TABLE III. 
b d 
| ge 83 
DORSAL SPINES. E É : z 
A à 
| 
. | 
XIII 2 2.631 
AIV 21 
XV 32 42.11 
XVI 12 15.789 
XVII 9 11.841 
Average number of spines...... 1575 
In Table IV the same data are given for the dorsal rays. 
The average number of rays is 155, about the same as the 
spines. Fifteen is seen to be the number in about 50 per cent. 
of all the specimens examined. While 42.11 per cent. have 
fifteen dorsal spines, and 50.007 per cent. have fifteen dorsal 
.. rays, only 21.05 per cent. have a combination of fifteen npe | 
and fifteen rays. 
TABLE IV. 
sg =. 
: | DoRSAL RAYS. ii 3 i 
a © 
z [s 
Et 9 11.841 
ug ^15 i i 50.007 
16 omes oe 
Tsai DOE : efe 5.262. 
Average number of ray... 1575 ; 
pe T 
da o 
"he Vistas: in | ds anal fn are given in n Table Vv. The d 
anal fins dele 76 —— i E a 
