ME, W. K. PARKER OK THE SKULL IK THE MAMMALIA. 
PLATE 19. 
Figures. 
Humber of 
times 
magnified. 
1 
■ 
Erinaceus europceus (3rd stage); new-born young, 2-j 
inches long ; endocranium ; lower view. 
5 
2 
The same ; upper view. 
5 
3 
Erinaceus europceus (4th stage); suckling, 2 weeks old ; 
3 inches long; endocranium ; lower view. 
4 
4 
The same ; upper view. 
4 
5 
The same ; part of endocranium ; upper view .... 
4 
6 
Erinaceus europceus (5th stage); 1 month old; head, 
1| inch long; dissected skull; end view. 
3 
7 
The same; part of endocranium, with some splints 
retained ; lower view. 
o 
0 
8 
The same ; section of skull. 
3 
9 
The same ; part of skull; outer view of auditory region . 
3 
