279 



3. The variation in the anal rays and dorsal spines are determinate with the 

 latitude, the southern specimens having a slightly larger number of rays and 

 spines. 



4. The color-pattern variations are determinate, varying through definite 

 stages from a simple to more complex pattern. 



In Table A and B are given the data on the anal rays and dorsal spines. 

 The localities are arranged in the order of their latitude from north to south. 

 From these we see that there is both an increase in the average number of rays 

 and spines and in the number that pi'evails in each case from north to south. In 

 the anal fin 10 is the prevailing number north, and 11 and 12 south, of the Ohio 

 River. Fourteen and fifteen are the prevailing numlier of dorsal spines in the 

 north and 15, 16 and 17 in the south. 



TABLE A. 



LOCALITY. 





W CO 



';5 ~ 



Torch Lake, Mich 



Cedar Rapids, Iowa 



White River, at Indianapolis 



Gosport, Ind : 



Bean Blossom, Ind 



Rushville, Ind 



Wild Cat Creek, Ind 



Pike Creek, Ind 



Illinois 



Nipisink Lake, 111 



Monongahela River 



Hartford, Ky 



Green River, Greensburg, Ky 



Little Barren River, Osceola, Ky 



Little South Fork Cumberland River, Wayne 



County, Ky 



Eagle Creek, Olympus, Tenn 



Obeys River, Elizabethtown, Tenn 



Watauga River, Elizabethtown, Tenn 



NoBth Fork Holston River, Saltville, Va 



Eureka Springs, Ark 



Chocola Creek, Oxford, Ala 



San Marcos Springs, Tex 



7 

 1 

 1 

 5 

 17 

 1 

 1 

 2 



1 

 2 

 1 

 4 

 3 

 4 



1 

 2 

 13 

 2 

 1 

 1 

 4 

 2 



lOi 

 12 

 10 

 10 



10 



11 

 11 



10 



10^ 



10 



lOJ 



lOf 



11 



11 

 11 



HA 



10* 

 12" 



11 



1 

 1 

 1 



3 

 1 



1 

 2 

 4 



1 

 2 

 5 

 1 



3 

 2 



7 



i" 

 i 



