86 
DR.  R.  E.  GRANT  ON  THE  ANATOMY  OF  SEPIOLA  VULGARIS. 
tween  the  third  and  fourth  arms  on  each  side ;  b.  h.  spotless  white  band  around  the 
orifice  of  the  sac  ;  c.  c.  villous  surface  of  the  expanded  termination  of  the  tentacula. 
Fig.  5.  Back  view  of  the  trunk  with  the  skin  removed,  a.  soft  transparent  dorsal 
lamina  ;  b.  b.  cartilaginous  scapula  of  the  dorsal  fins,  with  muscnXdS  fasciculi  passing  on 
to  them  from  the  surface  of  the  mantle ;  c.  c.  extensor  muscles  of  the  dorsal  fins ; 
d.  longitudinal  muscular /ascicitZi  of  the  exterior  of  the  mantle. 
Fig.  6.  a.  alternate  double  series  of  pedunculated  suckers  of  the  arms  of  Sepiola  vul- 
garis ;  b.  one  of  these  suckers  with  its  muscular  peduncle  magnified ;  c.  crowded  irre- 
gular arrangement  of  the  pedunculated  suckers  of  Sep.  stenodactyla. 
Fig.  7.  Front  view  of  the  digestive  organs  of  Sepiola  vulgaris,  a.  oesophagus  ;  b.  giz- 
zard marked  by  longitudinal  muscular  bands  ;  c.  spiral  stomach ;  d.  d.  intestine  drawn 
towards  the  left  side ;  e.  the  anus,  with  its  two  minute  tentacular  folds ;  /.  /.  the  two 
lobes  of  the  liver ;  g.  the  two  hepatic  ducts  surrounded  by  the  pancreatic  glands  in 
their  course  to  the  spiral  stomach ;  h.  h.  trilobate  form  of  the  ink  gland  ;  k.  duct  of  the 
ink  gland  terminating  in  the  rectum. 
Fig.  8.  Back  view  of  the  digestive  organs  of  Sepiola  vulgaris,  a.  a.  course  of  the 
oesophagus  along  the  middle  of  the  back  ;  b.  gizzard ;  c.  spiral  stomach  ;  d.  entrance  of 
the  hepato-pancreatic  duct  into  the  spiral  stomach ;  e.  intestine  passing  up  on  the  an- 
terior surface  of  the  liver;  /./.  the  two  lobes  of  the  liver  united  at  their  upper  part; 
g.  g.  the  inferior  pair  of  salivary  glands ;  h.  h.  their  ducts  passing  up  behind  the 
oesophagus. 
Fig.  9.  Circulating  and  respiratory  organs  of  Sep.  vulgaris,  a.  vena  cava  ;  b.  &,  vesi- 
cular bodies  on  the  two  branchial  arteries ;  c.  c.  two  branchial  hearts  or  portions  of 
the  auricle ;  d.  d.  fleshy  appendices  of  the  branchial  hearts ;  e.  e.  branchial  arteries ; 
/./.  branchi<jB ;  g.g.  branchial  veins;  h.  h.  enlargements  of  the  branchial  veins  at  their 
entrance  into  the  systemic  heart ;  i.  the  systemic  heart  or  ventricle ;  k.  the  dorsal  or 
ascending  aorta ;  /.  the  ventral  or  descending  aorta ;  m.  branches  to  the  organs  of  ge- 
neration from  the  trunk  of  the  ventral  aorta. 
Fig.  10.  Female  organs  of  generation  of  Sep.  vulgaris  seen  from  before.  The  mantle 
and  the  syphon  are  here  cut  open.  a.  valvular  fold  in  the  interior  and  back  part  of  the 
syphon  ;  b.  b.  articular  cartilages  connecting  the  base  of  the  syphon  to  the  parietes  of  the 
sac  ;  c.  ovarium  filled  with  ova,  and  occupying  the  base  of  the  sac  ;  d.  d.  two  large  glands 
of  the  oviducts  ;  e.  e.  terminations  of  the  two  oviducts. 
Fig.  1 1 .  Male  organs  of  generation  seen  from  before,  a.  testis  ;  b.  vas  deferens ; 
c.  epididymis  ;  d.  penis. 
Fig.  12.  Structure  of  the  ova  as  seen  through  the  microscope. 
Fig.  13.  Portion  of  the  hepatic  ducts  laid  open  to  show  the  oblique  orifices  of  the 
ducts  of  the  pancreatic  glands,  a.  a.  hepatic  ducts  laid  open  ;  b.  b.  pancreatic  glands  ; 
c.  c.  their  openings  into  the  hepatic  ducts. 
