BULLETIN OF THE UNITED STATES FISH COMMISSION, 
17(i 
This fish is rather houy, of course, but its considerable size reduces this objection to a minimum. 
When taken from these cold lakes the flesh is firm and sweet, and the “yellowbelly ” must be taken 
into account when the game and food fishes of Idaho are under consideration. 
In the following table are given comparative measurements of several examples of this species 
all from Idaho : 
Comparatire measurements of specimens of Ptychocheilus, orec/onensis from Idaho. 
Noa. 
Head. 
Depth. 
Eye. 
Snout. 
Dorsal. 
Aual. 
Scales. 
Length. 
Inches. 
107 
H 
6 
31 
9 
8 
16-77- 9 
12f 
108 
3i 
4| 
51 
31 
9 
8 
16-73- 9 
14i 
106 
3i 
6i 
3 
9 
8 
lG-75- 9 
124 
15a 
4 
5 
6 
31 
9 
8 
16-73- 9 
148 
4 
5§ 
6 
31 
9 
8 
16-78- 9 
91 
150 
3i 
7 
3 
9 
8 
16-76- 9 
13i 
149 
3f 
li 
7 
3 
9 
8 
17-75- 9 
12J 
151 
3| 
4i 
65 
3 
9 
8 
16-74- 9 
13 
167 
3i 
4|- 
6 
3 
9 
8 
16-72- 8 
114 
166 
4 
ti 
3 
9 
8 
15-74- 9 
llj 
165 
4 
5 
6 
3 
9 
8 
16-70- 8 
13| 
164 
4 
5 
6^ 
3 
9 
8 
1,5-72- 8 
Hi 
ie;i 
4 
5-1 
6 
3 
9 
8 
15-75- 8 
10^ 
93 
4 
6| 
3 
9 
8 
16-75- 9 
13 
92 
3| 
4| 
7 
3 
9 
8 
15-7.5- 9 
12 
101 
31 
6i 
3 
9 
8 
16-78- 8 
13§ 
102 
3| 
6 
3 
9 
8 
16-78- 8 
11^ 
201 
4 
5 
5 
31 
9 
8 
15-76- 9 
7J 
204 
51 
31 
9 
8 
15-74- 8 
7 
205 
4 
ii 
5 
31 
9 
8 
14-70- 8 
6| 
207 
4 
5 
5 
31 
9 
8 
15-78- 8 
61 
202 
4 
45- 
5 
31 
9 
8 
16-71- 9 
8 
206 
35 • 
ii 
41 
9 
8 
16-69- 9 
5| 
203 
3| 
n 
4-J 
3i 
9 
8 
15-72- 8 
7 
3§ 
5-i- 
4 
H 
9 
8 
16 75 8 
4f 
4 
H 
9 
8 
15 73 8 
3|- 
5 
9 
8 
15 69 8 
4-i 
4 
9 
8 
15-70- 8 
33 
5 
4^ 
9 
8 
10 69 8 
3f 
5 
4 
3^ 
9 
a 
15-73 8 
4| 
4 
3| 
9 
8 
15 75 8 
3|- 
5 
3^ 
9 
8 
15 73 8 
3i 
5 
4 
3| 
9 
8 
15 70- 8 
H 
5A 
4^ 
3 
9 
8 
15 72 8 
3i 
5 s 
4 ' 
9 
8 
15 71 8 
5 
4 
3§ 
9 
8 
15 69 8 
4 
3J- 
9 
8 
15 72 8 
4^- 
4-1- 
3 
9 
8 
15 70 8 
H 
5 
4 
3 ^ 
9 
8 
15 69 8 
Sh 
4§ 
4^ 
3 
9 
8 
15 71 8 
3| 
4 
9 
8 
15 74 8 
U 
4 
3i 
9 
8 
15 72 8 
5 
63 
3 
9 
8 
16-80- 9 
144 
3| 
4e' 
ei 
3 
9 
8 
17-75- 9 
134 
3i 
5-1 
6J 
3 
9 
8 
16-73- 9 
134 
3§ 
51 
3 
9 
8 
15-76-10 
14 
Teeth, usually 2, 4-5, 2, strong and well hooked, but without grinding surface. 
