222 
TEliTIAliY VERTEBEATA OE THE rAYtM. 
somewhai in advance oE the liinder border of the tooth next in front ; there is a deej) 
ibssa for the rece[)tion of the lower molar behind and to the inner side of 7 n. 2. The 
whole dentition, so far as preserved, is closely similar to that of Pterodon dasjjuroides, 
from which, however, this s{)ecies is distinguished by its greater size. 
The dimensions (in centimetres) of this specimen are : — 
AVidth of snout at level of canines 7 
,, „ bebiudpwi. 2 5-5 
Text-fig. 69. 
Anterior part of skull of (1) Pki-odon africanus : A, from right side ; B, from below. 
«.]>■/., anterior palatine foramen; ao.f., antorbital foramen; m. 1-2, first and second molars; jam. 2-4, 
second, third, and fourth premolars. On the right side the second molar has been restored from that 
preserved on the left. | nat. size. 
The dimensions (in centimetres) of the teeth are : — 
Length. 
Wiilth, 
pm. 2 
1-2 
2 >ni. 3 
2-4 
1-3 
pm. 4 
2-5 
2 
2-9 
2 
2-3 
Length from anterior end of 2 to posterior end of »n. 2, 13'5 app. 
