MR.  R.  OWEN  ON  THE  STOMACH  OF  SEMNOPITHECUS. 
67 
The  extremity  of  the  cardiac  division  is  thus  slightly  indented,  reminding  one  of  the 
similar  but  more  marked  division  of  the  same  part  of  the  stomach  in  the  Kangaroo, 
which  in  other  respects  bears  so  strong  a  resemblance  to  the  present. 
The  length  of  the  cardiac  division  is  3  inches  ;  its  greatest  diameter,  3  inches  4  lines. 
The  second  or  middle  compartment  of  the  stomach  is  composed  of  a  double  series  of 
sacculi  of  different  sizes,  puckered  up  upon  the  longitudinal  band  above  mentioned. 
Some  of  these  sacculi  have  a  diameter  of  3  inches,  others  of  1  inch.  They  are 
formed  principally  at  the  expense  of  the  anterior  parietes  of  the  stomach,  and  are  eleven 
in  number.  The  septa,  by  which  they  are  divided  from  each  other,  are  of  a  semilunar 
form,  and  project  into  the  cavity  of  the  stomach  to  the  extent  of  half  an  inch,  and 
a  few  to  that  of  an  inch. 
The  length  of  this  part  of  the  stomach,  in  a  straight  line,  is  5^  inches ;  its  greatest 
diameter,  5  inches. 
The  third  or  pyloric  division  of  the  stomach  commences  a  little  to  the  right  of  the 
(Esophagus,  where  the  second  longitudinal  band  begins.  It  is  a  narrow  and  almost 
cylindrical  canal,  gradually  diminishing  in  diameter  to  the  pylorus,  bent  in  a  sigmoid 
form,  and  terminating  by  making  a  complete  turn  upon  itself.  It  is  only  this  part  of 
the  stomach  which  is  puckered  up  on  the  two  bands  above  described.  The  sacculi  thus 
formed  are,  however,  by  no  means  so  large  or  so  completely  separated  from  each  other 
as  in  the  preceding  division ;  and  they  become  gradually  less  distinct  to  within  5 
inches  of  the  pylorus,  where  they  cease  altogether.  A  similar  gradual  disappearance  of 
the  sacculi  is  observable  in  the  stomach  of  the  Kangaroo. 
The  whole  length  of  this  division,  taken  midway  between  the  two  curvatures,  is 
I  foot  6  inches ;  its  greatest  diameter  is  2  inches  ;  its  smallest  diameter,  1  inch. 
In  considering  this  stomach  as  being  made  up  of  three  principal  divisions,  I  must 
not  be  understood  to  suppose  them  as  being  equally  distinct  with  the  different  cavities 
of  a  ruminant  or  cetaceous  stomach  :  they  are  not  characterized  by  any  essential  dif- 
ference of  structure,  for  none  of  them  possess  a  cuticular  lining.  The  three  divisions 
are,  however,  sufiiciently  obvious  to  justify  their  separate  consideration  for  the  facility 
of  the  description  of  so  complicated  an  organ. 
In  another  species  of  Semnopithecus,  Semn.  fascicularis,  (the  Croo  of  Sumatra  and 
Semn.  comatus  of  M.  Desmarest,)  the  stomach  presented  precisely  the  same  structure  as 
the  preceding.  Its  dimensions  were  not,  however,  quite  so  large  in  proportion  to  the 
size  of  the  animal.  The  individual  examined  was  younger  than  the  Entellus,  the  stomach 
of  which  has  just  been  described. 
From  the  disproportionate  size  of  the  stomach  in  these  animals,  some  differences  are 
met  with  in  the  disposition  of  the  other  viscera  of  the  abdominal  cavity.  The  liver, 
instead  of  crossing  the  epigastric  to  the  left  hypochondriac  region,  extends  downwards 
from  the  right  hypochondriac  to  the  right  lumbar  region ;  the  whole  of  the  opposite 
side  of  the  abdomen,  with  the  epigastric  region,  being  occupied  by  the  enormous  sto- 
K  2 
