222 



TEETIAET VERTEBEATA OE THE EAYtTM. 



somewhat iu advance o£ the hinder border of the tooth next in front ; there is a Jeej) 

 fossa for the reception of the lower molar behind and to the inner side of m. 2. The 

 whole dentition, so far as preserved, is closely similar to that of Pterodon dast/iwoides, 

 from which^ however, this species is distinguished by its greater size. 

 The dimensions (in centimetres) of this specimen are : — 



Width of snout at level of canines 7 



,, „ behind pm. 2 5-5 



Text-fig. 69. 



Af 



pmrf:. 



m.z. 



m.l. 



Anterior part of skull of {'i) Pterodon africanus : A, from right side ; B, from below. 

 a.p.f., anterior palatine foramen; ao.f., antorbital foramen; m. 1-2, first and second molars; ^m. 2-4, 

 second, third, and fourth premolars. On the right side the second molar has been restored from that 



preserved on the left. 



g nat. size. 



The dimensions (in centimetres) of the teeth are : — 



length. 



pm.2 2-4 app. 



pm.3 2-4 



pm. 4 2-5 



TO. 1 2-9 



m. 2 3-6 



Width. 

 1-2 

 1-3 

 2 

 2 

 2-3 



Length from anterior end oi pm. 2 to posterior end of to. 2, 13'5 app. 



