288 



number in the fins separately. In Turkey Lake nearly 37 per cent, have the 

 average number of the fins taken together, while 44 per cent, and 52 per cent, 

 have the average number in the spinous and soft dorsal respectively. In Tippe- 

 canoe Lake 41 per cent, have the average number for both fins, while 52 per 

 cent, and 61 per cent, have the average number in the spinous and soft dorsals- 

 respectively. 



TABLE VII. 



1. This species is equally abundant in the two lakes. 



2. The color ])attern of Tippecanoe Lake specimens shows a greater affinity 

 for the primitive, simple Wabash River pattern than does that of Turkey Lake 

 specimens. 



3. In Turkey Lake the nape is usually naked ; in Tippecanoe Lake the 

 nape is usually scaled. 



4. Tippecanoe Lake specimens have a smaller number of scales in the lat- 

 eral line. 



5. The^anal spines vary but little, and show the same variation in the two 

 lakes. 



6. The anal fin is somewhat larger in the Tippecanoe Lake specimens. 



7. Turkey Lake specimens have one more dorsal spine. 



8. Tippecanoe I>ake specimens have one more dorsal ray, 16 rays is the 

 mean in Tippecanoe Lake and 15 in Turkey Lake. 



9. The combinations of the dorsal spines and rays are determined by the 

 numbers that prevail in the fins .-eparately. 



