A  NEW  GENUS  OF  CARNIVORA. 
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which  adds  considerably  to  its  breadth,  and  at  once  distinguishes  it  from  all  the  other 
teeth.  Next  in  succession  follows  the  carnassier,  which  is  as  long  as  the  second  and 
third  false  molars  together.  In  its  general  form  it  resembles  the  third  false  molar,  con- 
sisting of  a  large  trenchant  lobe  in  the  centre,  with  a  smaller  one  on  each  side,  and  a 
blunt  tuberculous  lobe  of  considerable  dimensions  on  its  inner  surface.  The  lateral 
lobes,  however,  are  here  much  more  developed  than  those  of  the  false  molars  ;  the  pos- 
terior one,  in  particular,  occupies  nearly  half  the  entire  length  of  the  tooth,  and  from 
its  blunt,  flattened  form,  appears  to  belong  more  properly  to  the  tuberculous  than  to 
the  carnivorous  part  of  the  dentition ;  and  the  internal  lobe,  which  exhibits  the  same 
general  characters,  is  likewise  very  large,  and  runs  for  a  considerable  way  into  the 
palate.  A  section  of  the  whole  tooth  would  form  an  obtuse-angled  triangle,  of  which 
the  anterior  lobe  would  occupy  the  obtuse  angle,  and  the  interior  and  posterior  lobes, 
the  two  acute  angles  respectively.  The  first  tuberculous  tooth  is  nearly  half  the  length 
of  the  carnassier  ;  but  its  breadth,  or  dimensions  measuring  from  the  outer  surface  of  the 
jaw  inwards,  is  nearly  three  times  that  length :  it  is  perfectly  flat  on  the  crown,  from 
the  effects  of  long  use,  but  appears  to  have  originally  consisted  of  two  distinct  tubercles, 
one  on  the  outer,  the  other  on  the  inner  surface,  separated  from  one  another  by  a  deep 
depression.  The  second  tuberculous  tooth  is,  as  to  form,  in  all  respects  similar  to  the 
first,  but  is  little  more  than  half  its  size. 
In  the  under  jaw  the  lateral  incisors  are  separated  from  the  canines  by  a  vacant  space, 
which  receives  the  upper  canine  in  the  reciprocal  position  of  the  jaws.  The  three  false 
molars  are  of  the  normal  form  of  these  teeth  in  general,  resembling  the  second  false 
molar  of  the  upper  jaw,  but  rather  larger  and  more  developed,  and  differing  from  one 
another  in  having  the  lateral  lobes  successively  more  distinctly  separated  from  the 
central,  scarcely  apparent  in  the  first,  but  large  and  well-developed  in  the  third.  This 
latter  tooth  wants  the  interior  tuberculous  lobe  of  its  corresponding  analogue  above, 
because  the  narrowness  of  the  under  jaw  does  not  permit  any  development  in  that  di- 
rection ;  there  seems  to  be,  nevertheless,  a  faint  indication  of  it  on  the  inner  side  of 
the  posterior  lateral  lobe,  almost  in  contact  with  the  carnassier.  The  carnassier,  also, 
owing  to  the  same  cause,  is  of  a  form  essentially  different  from  that  of  the  upper  jaw. 
It  is  a  long  and  tolerably  thick  tooth,  with  a  deep  transverse  depression  in  the  middle, 
and  a  small  furrow  on  the  interior  of  the  first  half.  This  first  part  appears  to  have 
originally  consisted  of  three  small  but  distinct  tubercles,  one  on  the  outside  and  two 
within,  separated  by  the  small  furrow  already  mentioned.  The  heel  of  the  tooth  con- 
sists of  a  single  large,  flat  tubercle,  which,  in  the  reciprocal  position  of  the  jaws,  is  op- 
posed to  the  first  superior  tuberculous  tooth :  there  is  no  interior  tubercle,  as  in  the 
upper  carnassier,  owing  to  the  restraint  imposed  upon  the  development  of  the  lower 
teeth  in  this  direction  by  the  comparative  narrowness  of  the  under  jaw.  The  single 
tuberculous  tooth  is  hkewise  influenced  by  the  same  cause.  Its  greatest  dimensions 
are  in  a  longitudinal  direction,  and  it  appears  equally  to  have  consisted  originally  of 
