SALMONOID FISHES OF THE GREAT EAKES. 
37 
Comparison of Coregonus albus and C. clupeaformis. 
C. albus. Lake Erie. 
C. clupeaformis, Lake Ontario. 
Specimen no . . 
494 
5255 
5254 
5253 
4933 
4914 
4913 
4936 
4911 
Body length mm . . 
340 
35 S 
315 
290 
275 
26s 
350 
190 
265 
Dorsal rays 
1 1 
IO 
1 1 
1 1 
1 1 
1 1 
12 
I I 
I I 
Anal rays 
1 2 
14 
1 2 
1 1 
1 1 
1 1 
IO 
I I 
I I 
Scales 
9-80-8 
9-86-8 
10-81-8 
10-79-9 
10-79-9 
9-82-8 
10—82-8 
IO-80-8 
i 0-8 i -8 
Branchiostegals 
9 
9 
9 
9 
9 
9 
9 
9 
9 
Gillrakers 
Comparative measurements: 0 
10+16 
1 1 +16 
9+18 
10+18 
10 +18 
10 +19 
10 +18 
9+16 
10+18 
Head 
0. 20 
0. 225 
0. 215 
0. 215 
O. 21 
0. 20 
0. 22 
0. 225 
0. 21 
Body depth 
Caudal peduncle — 
• 30 
• 325 
. 29 
• 30 
• 27 
. 26 
. 29 
. 265 
. 29 
Length 
• 105 
. 10 
• °8s 
.08 
. 09 
. 10 
- IO 
• 125 
• IIS 
Depth 
. 10 
• 095 
. 10 
• 105 
• 085 
• 085 
. 09 
. 09 
■ 09 
Eye 
• 045 
. 04 
■ 045 
. 04 
• 05 
• 05 
• 045 
• 05 
• 057 
Snout 
. 04 
. 06 
• 05 
. 052 
• 05 
• 05 
■ 055 
• 05 
. 05 
Maxillary from tip of snout .... 
■ 055 
. 065 
. 06 
. 06 
. 06 
. 06 
■ 065 
. 06s 
. 07 
Distance snout to occiput 
■ 14 
• 15 
• 15 
. 16 
• 15 
■ IS 
• IS 
. 16 
• 15 
Pectoral length 
. 18 
• 19 
. 18 
. 18 
• 163 
• 17 
• 19 
• 165 
. 18 
Ventral length 
. 18 
. 20 
. 18 
. 18 
. 165 
• 17 
• 17 
• 17 
■ 17 
Dorsal height 
■ 195 
. 18 
■ 185 
. 18 
• 175 
• 17 
• 17 
. 18s 
■ 17 
Anal height 
. 12 
■ 13 
• 13 
• 13 
. 12 
. I I 
. 12 
■ US 
. 115 
“ Measurements in hundredths of body lengths unless otherwise specified. 
Comparison of specimens of Coregonus clupeaformis. 
Lake 
Superior. 
Lake Huron. 
Lake 
Michigan. 
Lake of the 
Woods. 
Lake Waubegon. 
Rainy 
Lake. 
Specimen no . . 
5227 
4927 
13112 
528 
11918 
5231 
5259 
A 
Body length mm . . 
283 
37 o 
285 
190 
420 
36s 
270 
445 
Dorsal rays 
12 
1 2 
1 1 
1 1 
1 1 
1 1 
12 
13 
Anal rays 
12 
1 1 
1 1 
1 1 
1 1 
14 
1 1 
14 
Scales 
10-84-8 
10-79-8 
10-78-9 
10-79-8 
10-70-8 
10-74-9 
81 
86 
Branchiostegals 
9 
9 
9 
9 
9 
9 
9 
IO 
Gillrakers 
Comparative measure- 
ments: ° 
20 +18 
10 +16 
8+17 
10+16 
Evisc. 
Evisc. 
Evisc. 
Evisc. 
Head 
0. 20 
0. 21 
0. 21 
0. 225 
0. 23 
0. 225 
O. 235 
0. 23S 
Body depth 
Caudal peduncle — 
• 25 
. 26 
. 26 
• 25 
• 37 
• 37 
. 29 
• 32 
Length 
• 105 
. 10 
. 12 
. 1 1 
. 085 
• 105 
. 09 
. 09 
Depth 
.08 
. 09 
. 09 
. 085 
. 11 
. 1 1 
. IO 
. IO 
Eye 
. 04 
. 04 
• 05 
• 05 
■ 045 
■ 045 
• 05 
. 045 
Snout 
Maxillary from tip of 
■ 05 
. 06 
• 05 
. 06 
• 055 
. 06 
. 06 
■ 065 
snout 
Distance snout to occi- 
• 055 
. 06 
• 05 
• 065 
■ 075 
. 065 
. 07 
. 068 
put 
■ 15 
• 155 
• 15 
• 17 
. 16 
. 167 
. 165 
. 16 
Pectoral length 
. 16 
. 18 
• 15 
• 17 
. 21 
. 21 
. 20 
. 20 
Ventral length 
. 16 
. 18 
. 16 
• 175 
. 20 
. 20 
. 20 
. 19 
Dorsal height 
. 16 
. 20 
. 16 
. 195 
. 21 
. 2 1 
. 20 
• 17 
Anal height 
. 1 1 
• 13 
. 11 
. 33 
. 16 
• 14 
• 15 
. 12 
“Measurements in hundredths of body lengths unless otherwise specified. 
Coregonus albus I,e Sueur. Lake Erie Whitefish; Common Whitefish. (PL vi.) 
Coregonus albus Le Sueur, Jour. Ac. Nat. Sci. Phila., vol. I, 1818, p. 232, Lake Erie. Jordan & Evermann, Proc. 
U. S. Nat. Mus., vol. xxxvi, 1909, p. 171, Lake Erie. And of many other authors. 
Habitat: Take Erie and Lake St. Clair; introduced into other lakes. 
This species is the common whitefish of Take Erie. It is very close to Coregotms clupeaformis, 
the whitefish of the other lakes, differing only in form and color. Compared with the latter, the Erie 
whitefish has a smaller head, higher nape, more angular form, and the color is almost pure olive-white, 
without dark shades or dark stripes along the back. The flesh is softer, containing more fat. All 
these differences may be correlated with the fact that Lake Erie is shallow and its southern shore is 
fed by warm, shallow, muddy, or milky rivers. The difference shown by the wall-eyed pike of the 
different lakes is supposed to rest on the same variation in environment. As no difference appears 
