418 THE PUEECO EPOCH. 



on the untero-external part of the P-m. iv, and a weak one on the anterior 

 half of the P-m. iii. Enamel smooth on the true molars; weakly striate on 

 the external side of the P-m. iii and iv, and more strongly striate on the 

 inner side of the P-m. iv. 



The mandibular ramus is compressed and rather deep. The condyle 

 is well above the level of the crowns of the molars, and its articular face on 

 its inner half (external unknown) looks upwards. The coronoid process is 

 large, and rises close anterior to the condyle, and is in the plane of the 

 angle. The latter is mostly in a vertical plane. Its inferior border is de- 

 curved, and then recurved to an apex, which projects a little posterior to 

 the line of the condyle, and is a little incurved. The masseteric fossa is 

 defined anteriorly to the middle of the depth of the horizontal ramus, but 

 below that point definition i.s wanting. 



The inferior canine is rather abruptly recurved. There is no diastema 

 behind it. The crown of the second premolar is rather elevated, ifi com- 

 pressed, has a posterior acute heel, and a vertical anterior outline without 

 basal tubercle. The third premolar has the same characters, except that 

 the heel is truncate behind, and has an inclosed fissure above. The fourth 

 premolar is more robust, and has a wider heel whose basin is open on the 

 external side. There is no anterior basal tubercle, but a low ciuguluni 

 extending from the inner base of the principal cusp. As in the other 

 premolars this cusp is compressed, and it has a fi-ee postero-external edge. 

 The second true molar is a little smaller than the first or third. The cusps 

 of the anterior pair are closely connected, and the anterior ridge of the 

 internal one descends to the base, and forms an anterior cingulum which 

 turns back to the anterior external base of the external cusp. The internal 

 anterior cusp also has a sharp posterior edge which joins a corresponding 

 edge of the external posterior cusj). All of the cusps are rather acute. A 

 cingulum descends from the posterior median cusp and extends to the pos- 

 terior base of the anterior external cusp. It is most prominent on the hist 

 molar, where the posterior cusp forms a prominent heel. The edge-like 

 compression of the anterior inner cusp is most marked on the first true 

 molar, and least marked on the third. 



The portion of skull preserved shows a moderately elongate muzzle, 



