PEIMATES FEOM MADAGASCAE, 

 Text-fig. 19. 



97 



Restoration of sknll and mandible of Mesopropithecus pitJiecoides. 



Subfamily Arch^olemurin^. 



Subfossil ape-like Indrisidag which retain the largest number of ancestral pithecoid 

 characters. They retain the " primitive " Primate dentition in the upper jaw, though 

 there is reduction of the third molar. The lower jaw is massive and has many 

 Simian features ; it has lost the canine of the permanent dentition. Upper incisors 

 large and functionally important. Lower incisors show incipient tendency to pectinate 

 disposition, which is characteristic of existing genera. Lower first premolar caniniform. 



Skull pyriform with narrow postorbital frontal region, long widely curved zygomata, 

 and large auditory bullae. Lacrymal fossa on or near orbital margin. 



T-v .1/- 1 i. 2:e. 1: pm. 3 : m. 3 



Dental formula : i.2: e.O: pm.3: m.a' 

 Synonym : Nesopithecince (Major). 



Genus ARCHiEOLEMUR (Filhol). (Plates XVI.-XX.) 

 Definition. — Subfossil ape-like Lemuroids with pyriform brain-case, showing marked 

 postorbital frontal constriction. Occipital and sagittal crests frequently developed 

 and interorbital frontal region prominently convex. Incisors and premolars 

 functionally important, the latter having a blade-like disposition in both upper and 

 lower jaws. Lower first premolar caniniform ; third molar reduced in both jaws. 



Dental formula : i- 2: c. l: pm.3: m. 3 

 I. 2: c. 0: pm. o: m. 3 



Synonym : Nesopithecus (Major). 

 It is not my intention to give a full description of the fine series of skulls of 



