CLASSIFICATION OF THE LEMUROIDEA 435 



Outer cusps of m^, m' often V-shaped. 

 Skull short to long. 



Bullfe normal (except in Palceopropithecus) . 



Genera: Avalii { Licit anohis) , Mcsopropitheriix. Propithecus, Tndris, 

 Palceopropithecus. 



Subfamily Arehccolcmurimu 



Medial upper incisors and lower canines enlarged, diprodont, with wide, 

 chisel-like edges, with enamel thicker on anterior face. 



'^J'hree lower preinolni's; preniohirs witlt laterally compressed bladelike 

 edges. 



Molars more or less ])ilo})liudout. 



Orbits directed forward. 



A sagittal crest. 



Bullae noiTTial. 



Genera: Archceoleniur (Nesojjifliecus), Iladropithecus. 



Family Chiromyidae (Daubentoniida^) 



Eecent of Madagascar. 



Dental formula : I—' C— ' P— > M— • 



U i U o 



Medial upper incisors and lower canines (?) much enlarged, compressed, 

 diprotodont, witb thick enamel on anterior border. 



Upper canine, p^~^ and p^-, absent, leaving a wide diastema. 



Tapper molars small : cus])s degenerate; surface of crown wrinkled. 



^r^ with little or no ibird lobe. 



Lacrymal very littk' extended on face; lacrymal foramen slightly in 

 front of crista posterior of orbit. 



Brain-case expanded ; no sagittal crest. 



Bulls} and course of internal carotid as in TiOmnvida' and Indrisida?. 



Angle of mandible mucb reduced. 



Genera: Chiromi/s ( /)aiiJ)cnfonia) . 



Series lorisiformes 



1. ^falar more or Ics-; sc|iai'atod froin bici'ymal hy maxillary. 



2. Orbits cnlaigcd. widely opening into temjioral fossa?. 



3. Ivacrymal foramen in ti'oiit of oi-hit. 



4. Nasals and preniaxillaries more or less prodnced into a tubular 



rostrum. 



5. Auditoiy bulla) of moderate to large size. 



