Prodicynodon, 71 



ill front than Ijeliind. The interorbital region is much narrower 

 tlian is usual in Anomodont skulls. 



Each of the maxillaries is considerably weathered. Ou the 

 right side there is the remains of a moderate sized tusk which is 

 directed forwards and slightly downwards. IJehind the tusk the 

 maxillary shows a greater relative development than in Dicynodoii 

 and on the left side of the skull it is seen that this posterior j^art 

 of the bone bears a number of small simple molars. At least hve 

 teeth can be detected, and these are arranged in two rows. There 

 is no indication of any serrations on the teeth. 



The palatines and pterygoids so far as preserved agree closely 

 with those bones in Dicynodnii. 



Of the lower jaw only the front half is preserved. It is 

 in front deeper than in Dicynodon and much less compressed 

 laterally. The dentary has a very well developed ridge above tin; 

 lateral vacuity. The splenial is well developed and extends liaeU- 

 wards apparently as far as the dentary. 



Fig 3 ;tud tig. 4, Plate IV , show side view and iii)iicr view uf tlitj truul 

 of the bkull of I'rodk-ijnudoii ptarstviicnsis ; very slightly eul irgfd. 



Opisthoctenodox acjilis, gen. nov. et sp. nov. 



The specimen which is made the type of this new genus and 

 species was found at Pearslon, not far from the spot wdiere the 

 ty])e of Prod icy )U)d(in was found. It consists of a fairh" complete 

 but crushed skull, with the folh)wing other recognisal)le remains : 

 — left clavicle, interclavicle, sternum, left humerus, radius and 

 ulna of both sides, fairly complete right carpus with a number of 

 plialanges and some cai'pal and phalangeal bones of the other 

 manus. A fairly complete pelvis with the greater part of l)nth 

 hind liniljs was found close to the front part of the skeleton, but 

 it is possible tliat the pelvis does not belong to the same individual. 



The skull, as will be seen from the figure (fig. 1, pi. IV) is 

 strikingly like that of a small Oiidenodon, but the presence of a 

 series of teetli in the maxillary and dentary bones at once dis- 

 tinguislu^s it from the better known Anomodont. The front of 

 the l)eak tlitfeis from that in Oudenodon, in that it terminates in a 

 small, sharp, downwardly directed point. The frontal and pre- 

 frontal regions are similar to those in Oiidenodon^ but the parietal 

 region is relatively very much broader, being nearly twice as 



