1 
2 
3 
3. 
4 
5 
6 
7 
8 
9 
10 
11 
12 
MR. W. K. PARKER OK THE SKULL IK THE MAMMALIA. 
PLATE 31. 
Humber of 
times 
magnified. 
Sorex vulgaris (4th stage); skull of adult ; upper view . 
5 
The same ; lower view. 
5 
The same ; side view. 
5 
The same ; end view of lower jaw. 
5 
The same ; petromastoid bone ; inner view. 
12 . 
The same ; outer view. 
12 
The same ; malleus, incus, and tympanic ; outer view . 
18 
The same ; inner view. 
18 
The same ; stapes ; side view. 
18 
Sorex vulgaris (4th stage); adult; hyoid arch ; inner view 
7 
The same (3rd stage); skull; side view. 
7 
The same ; section ; side view. 
7 
The same ; hyoid arch. 
12 
