MR. W. K. PARKER ON THE SKULL IN THE MAMMALIA. 
PLATE 20. 
Number of 
Figures. times 
magnified. 
1 Erinaceus europeus (5th stage, continued) ; skull; lower 
|) NIC Wes eee oe ee oy eee ee ee Clee 3 
2 | The same ; upper view . 3 
3 The same; side view ..... . 3 
4 Erinaceus europeus (6th stage); young, 3 grown ; section 
(ee eevee ele ; 22 
5 The same (part) ; with septum removed . Md 22 
6 Erinaceus europeus (Sth stage); sub-adult; posterior 
sphenoid ; upper view 23 
if The same; lower view. . . . 24 
8 The same; end view, behind. . . . oa 24 
9 The same ; inferior (maxillary) turbinals; front view . 24 
10 The same; internal view . . ..... +... 24 
