AND  ACCOUNT  OF  A  NEW  SPECIES  FROM  THE  INDIAN  SEAS. 
27 
and  Pteropods  with  the  more  elevated  forms  of  Vertebrata.  It  possesses  characters 
hitherto  known  only  in  the  Testaceous  Cephalopods,  with  others  common  in  the  Naked 
species  ;  and  it  establishes  on  unequivocal  characters  the  existence  of  a  genus  hitherto 
regarded  as  doubtful.  The  structure  of  its  eyes  is  not  less  remarkable  than  the  con- 
dition of  the  tentacula,  and  the  great  development  of  its  longitudinal  dorsal  nerves.  In 
the  smallness  of  the  space  occupied  by  the  viscera  in  its  capacious  mantle,  it  more  re- 
sembles a  Clio  among  the  Pteropods  than  the  ordinary  forms  of  this  class.  No  other 
Cephalopod  has  yet  presented  a  spiral  stomach  like  that  of  Loligopsis,  or  similar  tubercles 
on  the  mantle ;  and  the  form  and  mode  of  termination  of  the  pancreatic  and  hepatic 
ducts  in  a  capacious  undivided  stomach  are  also  peculiar.  In  its  fasciculus  of  vesicles 
on  each  branchial  artery,  the  want  of  appendix  to  the  branchial  auricles,  the  structure 
and  position  of  its  systemic  ventricle,  and  the  origin  and  distribution  of  its  arterial 
trunks,  it  differs  from  any  known  form  of  Naked  or  Testaceous  Cephalopods,  though 
partaking  of  the  characters  of  both. 
EXPLANATION  OF  THE  FIGURES  OF  LOLIGOPSIS  GUTTATA. 
PLATE  11. 
Fig.  2.  Entire  animal,  back  view,  natural  size. 
Fig.  3.  Entire  animal,  front  view,  natural  size. 
Fig.  4.  Front  view  of  the  digestive  and  other  abdominal  viscera.  a.  oesophagus ; 
b.  gizzard  ;  c.  spiral  stomach ;  d.  anus ;  e.  e.  e.  e.  lobes  of  the  liver ;  /.  ink  gland  ; 
g.  ovarium ;  h,  h.  inner  surface  of  the  lateral  tubercles ;  k.  syphon  laid  open ;  /.  I.  rudi- 
mentary tentacula. 
Fig.  5.  Front  view  of  the  nervous  and  vascular  systems  in  situ.  a.  oesophageal  gan- 
glia ;  b.  great  dorsal  ganglia ;  c.  great  dorsal  nerves  ;  d.  vena  cava  ;  e.  its  vesicles ; 
/.  /.  branchial  hearts  preceded  each  by  a  cluster  of  vesicles ;  g.  g.  hepatic  ducts ; 
h.  pancreatic  glands. 
Fig.  6.  Nervous  system,  and  organs  of  vision,  a.  supra-oesophageal  or  cerebral  gan- 
glion ;  b.  sub-cesophageal  ganglion ;  c.  optic  nerve ;  d.  peduncle  of  the  eye ;  e.  e.  great 
dorsal  nerves  ;  /.  /.  their  ganglia. 
Fig.  7.  Hepatic  and  pancreatic  organs,  a.  a.  a.  a.  four  lobes  of  the  liver ;  b.  hepatic 
ducts  ;  c.  pancreatic  glands;  d.  opening  of  the  hepato-pancreatic  duct;  e.  crop;/,  giz- 
zard ;  g.  spiral  stomach ;  h.  intestine. 
Fig.  8.  Vascular  system,  a.  a.  a.  a.  vesicular  bodies  of  the  vena  cava  and  branchial 
arteries  ;  b.  b.  cluster  of  vesicles  surrounding  the  entrance  of  the  branchial  arteries  into 
the  auricles ;  c.  c.  branchial  auricles ;  d.  d.  branchial  arteries ;  e.  e.  branchial  veins ; 
/.  systemic  ventricle  ;  g.  anterior  or  ventral  aorta  going  to  the  anterior  parietes  of  the 
E  2 
