MR. W. K. PARKER ON THE SKULL IN THR MAMMALIA. 
Number of 
Figures. times 
magnified. 
| Erinaceus europeus (a series of stages of visceral arches); 
deep and superficial mandible and ear-drum ; inner 
view (Ist stage); embryo; 1} inchlong . . . . «| 8 
2 The same ; fore part of deep mandible ; upper view . . | 16 
3 | The same ; hyoid arch ; oblique view . . . . . . . | 8 
4 2nd stage; embryo; 24 inches long; deep and super- 
ficial mandible ; and ear-drum ; inner view . . . . 6 
5 3rd stage ; ripe young ; 24 inches long ; the same parts ; 
inner VIEW & “Sa geo feel ee Mer GR EG 54 
6 The same; hyoid arch; upper view. . . . - . - . 54 
7 4th stage ; young, 2 weeks old; the same parts; inner 
VIOW Ahk, Sle ee Ceres Mee sea win ean ee 4 
8 5th stage ; head, 14 inch long; same parts ; inner view . 3 
9 The same; hyoid arch; upper view. . . . 3 
10 7th stage; 3 grown; ear-drum ; outer view . 8 
11 | The same; inner view... .. | 8 
12 Sth stage ; adult ; malleus; outer view . 8 
13 | The same ; annulus tympanicus ; outer view. 8 
14 | The same ; hyoid arch; upper view... 22 
| 
