94 



DE. H. r. STANDING ON SUBPOSSIL 



The first and second molars by the strong development of their acute internal cusps 

 are again closely related to the three recent genera, though, on the other hand, the 

 flattening down of the small lingual cusps of these teeth recalls the condition of 

 Palmopropithecus. The third molar is much reduced as in all the Indrisinse, though 

 its antero-internal cusp is less vestigial than in most of the other genera. 



Text-fig. 18. 



■Maadibles of (A) Mesoprointhecus pithecoides and (B) ArcJiceolemur edivardsi, vie-wed from above, 

 and compared with those of (C) Indris and Old and New "World Monkeys (D) Colohus and 

 (F.) PHhecia, 



Turning to the mandible, we find here again a condition intermediate between that 

 of Archmolemm' and Propithecus. The massive character of the whole jaw, the great 

 vertical height of the body of the rami, the strong development and almost vertical 

 direction of the anterior margin of the alse, the form and size of the coronoid process, 



