THE  CHIMPANZEE  AND  ORANG  UTAN. 
373; 
Intermaxillary  hones  anchylosed  to  the  maxillaries  during  the  first  or  deciduous  den- 
tition. 
Ex.  The  Chimpanzee,  Black  Orang,  or  Pygmy.  {Troglodytes  niger,  Geoff.  Simia  Tro- 
glodytes, Blum.)    Jocko,  a  name  for  the  young  Chimpanzee. 
Height  of  adult  four  feet. 
Hab.  Africa. 
Subgenus  Pithecus. 
Muzzle  large,  elongated,  somewhat  rounded  anteriorly  ;  forehead  sloping  backwards ; 
slight  supraciliary  ridges,  but  strong  sagittal  and  lambdoidal  crests. 
Facial  angle  30°. 
Auricles  small. 
Twelve  pairs  of  ribs  ;  bones  of  the  sternum  in  a  double  alternate  row. 
Arms  reaching  to  the  ankle-joint. 
No  lig amentum  teres  in  the  hip-joint. 
Feet  long  and  narrow ;  hallux  not  extending  to  the  end  of  the  metacarpal  bone  of  the 
adjoining  toe  ;  often  wanting  the  \m^\x.e2l  phalanx  and  nail. 
Canines  very  large,  their  apices  extending  beyond  the  intervals  of  the  opposite  teeth. 
Intermaxillarg  hones  anchylosed  to  the  maxillaries  during  the  second  or  permanent  den- 
tition. 
Ex.  The  Orang  Utan,  or  Red  Orang.  {Pithecus  Satyrus,  Geoff.  Simia  Satyrus,  Linn.) 
Pongo,  a  name  for  the  adult,  originally  applied  to  the  Chimpanzee. 
Height  under  five  feet. 
Hab.  The  islands  of  Borneo  and  Sumatra. 
VOL.  I. 
