14 
The American Naturalist. 
(January, 
Below are given a number of tables which show the varia- 
tion in several characters. 
specimens. 
These tables are all from my own 
From these tables it will be noticed that the number of dor- 
sal rays is quite constant, being from 10to 13. The variation 
TABLE OF VARIATION FOR 26 SPECIMENS FROM MISSION. 
Remarks. 
Keel scarcely evident. 
Median keel scarcely evident. 
Median erate. 
Moilian keel well developed. 
Keel typi ci 
Keel well y hen 
eel no more than in montants. 
istinct. 
Keel typica rel ag 
Keel well developed. 
Keel moderate, 
Do. 
Do. 
Keel evident. 
f pupil. 
Remarks. 
Keel indistinct. 
PEER en. 
| | | | 
No. solk pe, a — Anal.) Scales, | Teeth.* Depth. SE aman ae 
| | En 
Sar NDH | it |— 
l 140 1325 18% 59-6} wee | 3 -2 (t) | Q 
2| 120 | 1982 | 21% | 11-53-512,54,1| 3 2-5 u be 
3| 1o |13% |19% zsa 325| ty | ¢ 
4| 105 | 12% | 2082 | 1258-6! 275-42) 3 1-4 i) | 
5 | 100 | 12%% | 1924 | 11-57-6| 2,4-4,2) 3 2-5 p) | g 
5} 102 | 1212 181 | 1260-6| 254,2! 31-2 () |e 
7 1144 | 20% | 12-57-5| 2,4-3,1] 3 3-7 | i} | 9 
; 1142 1982 | 12-5 54,1 3 3-5 | th} ee 
) 1244 | 194, | 12-61-6| 2,5-4,2; 323] (1) | 
1244 | 2154 | 1263-6 2541| 378| (p) |? 
1 12% | 2034 | 11-62-6| 2,5-4,2! 8 8-5 | (8) | i 
12%% | 20%% | 13-59-6| 1,5-4,2) 3 3-5 | lg 
121% | 2014 | 11-59-7| 2,5-4,1| 3 1-4 | ? |g 
> | 1284 | 2084 | 12-61-7| 25-41) 3 1-2 | p |a 
| 1142 | 1982 | 12-61-6| 254,1) 335] } g 
y | 1242 | 1882 | 13-50-7| 25-42) 31-2 | (o| g 
1242 | 1742 | 13-58-7| 2542| 3 2-3 H |? 
; ) 11% 1742 | 11-60-7| 254,2 3 1-2 oe 
) 12 | 57 | 25-42) 845 $ ? 
í 7 13-61-7| 25-38,2! 323 4) TEN 
; i 54,2 82-3 ) g 
‘ E T 61 | E6? 3 4-5 i 
23 t 5-4, 2| 
‘ 60 AE 5 54,2 3 45 T PE 
4 € 24 ! E 
q 64 os A Bie | | 
t 
_— rive aso ag observed that the beet individuals among the minnows usually have abnormal 
numbers o 
iteh 
Anterior aik nt main row on nig side is teed eect ab g con remote from e others, and 
ints inw 
gi 2 Equidistant from base of middle caudal rays and upper angle of preopercle. 
| Equidistant from base of middle caudal rays and posterior margin of eye. 
TABLE OF VARIATION FOR 8 SPECIMENS FROM SICAMOUS. 
| 
ion 
No.| Length | DOF- | Amal. Scales. | Teeth. | | pets: _| Position | Sex 
| 
f aia | : 
mm. f 
1 82 | 12% | P , 11-60-62, 4-3,1, 4— (*) 
z 92 12% | | 16% | 11-62-6; 2, 54, 2 ...... cote t+ 
3 12% | 14% | 14-62-7|2, 5-4,2, 3 3-5 + 
4l 87 | 12% | 17% | 12-605 2,54 | 4 REEE 
5 85 | 12% | 16% | 10-62-5| 2, 5-5,3, 4 1-5 i 
6 80 | 12% | 18% | 11-60-6) 2. 5-4,1 4 1-4 
$ 85 | 12% | 16% 11-59-52, 5-4,2 4 t 
8 77 |12% |17% | 11-61 |2, 5-4, 1| 415 
uidistant base of TRTE rays and upper 
HSEEE ee 
{ Equidistant from base of middle caudal ra; 
