q meet 
; ; 
i 
a { 
j : / 
: é 
/ 
| : . 
i / : 
| : | 
Fig. 10.— Anal sphincter muscles of female Canada geese in winter: 
muscle in repose; C and D, the muscle partially everted. 
10 
A and C, immature; B and D, adult; A and B, the 
