218 
TaBLE VII. 
| Tippecanoe | puskey Lake. 
Per cent. of specimens having 10 dorsal spines. .. -069- = S42. eee 
Per cent. of specimens having 11 dorsal spines... O69) °° * |x 
Per cent. of specimens having 12 dorsal spines. . . 0.82 0.23 
Per cent. of specimens having 13 dorsal spines... 11.85 5.17 
Per cent. of specimens having 14 dorsal spines... 61.44 | 42.57 
Per cent. of specimens having 15 dorsal spines... 25.21 43.48 
Per cent. of specimens having 16 dorsal spines... 1.30 7.29 
Per cent. of specimens having 17 dorsal spines... 0.27 0.94 
Per cent. of specimens having 18 dorsal spines...|}.............. 0.23 
‘ | |e ne 
Meanennmber iol rays oe: oe sree ra 14.20 14.56 
4. Dorsal Rays.—The dorsal rays vary from 10 to 20 in Tippecanoe Lake. 
The prevailing number of rays is 16, 51.03 per cent. having this number. There 
is a tendency to vary toward a lower number of rays. Thus, 35.55 per cent. have 
15 and only 10.74 per cent. have 17. In Turkey Lake the soft dorsal varies from 
12to18 rays. The prevailing number here is 15, with 53.98 per cent. of the 
specimens having this number. Here, too, the tendency to vary toward a lower 
number is quite marked, 31.40 per cent. having 14 and only 11.17 per cent. hav- 
ing 16. The mean number of rays is 15.66 for Tippecanoe Lake and 14.80 for 
Turkey Lake. 
Taste VIL. 
Ss enc at Turkey Lake. 
Per cent. of specimens having 10 dorsal rays..... OL07°) eo. 2 ci. ee 
Per cent. of specimens having»11 dorsal rays.....]...----0.+:2--|.eeeeeecnneee 
Per cent. of specimens having 12 dorsal rays..... 0.07 0.23 
Per cent. of specimens having 13 dorsal rays.....|..........+--- 1.88 
Per cent. of specimens having 14 dorsal rays..... 3.49 31.40 
Per cent. of specimens having 15 dorsal rays..... 35.55 53.98 
Per cent. of specimens having 16 dorsal rays..... 51.03 11.17 
Per cent. of specimens haying 17 dorsal rays..... 10.74 1.29 
Per cent. of specimens having 18 dorsal rays..... 0.69 0.23 
Per cent. of specimens having 19 dorsal rays.....).........2+-0+|---20eeeceeoee 
Per cent. of specimens having 20 dorsal rays..... 0.07 ©.|p.s0 poeeenens 
=-Mean number oft ays.:s s swcls a vasvectror.~ 6 cis: 15.66 14.8 
