34 
550 5 
500 
450 
400 
350 
a. 
= 
3 300 
(3) 
= 
oO 
2 250 
uo} 
oO 
ni 
= 
n 
200 
150 
100 
50 
320 - 
270 - 
= 220 - 
= 
— 
eo 
= 
S | 
is 170 
oe 
= 
=| 
i“) 
S 
<b) 
2 120 - 
70 
20 
L.J. PORTER 


rT] 
| e 
x 
o 
| a 
$ 
| ° 
rT] 
e | @ Neotype | 
K w Holotype | 
+ a oe 
+ 
x 
e 
r 
a 
° 
a 
Condylobasal length Ramus length Rostrum length Upper tooth row length Symphysis length 
a 
5 ° Neotype 
A m Holotype 
+ 
x 
o 
i‘ 
i 
A 
= 
e 
xk 
v 
b 
Lower tooth row Parietal width Mandibular fossa Rostrum width Ramus height Rostrum width at 
length length midlength 
Fig. 7 Range of length and width measurements for the skulls of Sousa chinensis obtained from Hong Kong and the holotype demonstrating the a, 
greatest and b, least variation between individuals. 
