338 
MR.  T.  BELL  ON  THE  GENUS  CANCER. 
The  carapax  is  very  broad  ;  the  surface  minutely  granulated  with  scattered  impressed 
points.  The  margin  is  divided  into  ten  shallow  contiguous  lobes,  the  extreme  edge  of 
which  has  a  number  of  small  granular  teeth,  and  which  from  the  fourth  to  the  ninth  have 
one  tooth  more  prominent  than  the  rest.  There  is  a  peculiarity  in  this  species  which 
does  not  occur  in  any  other  of  this  genus,  nor  perhaps  in  the  whole  order ;  the  furrows 
which  separate  the  branchial  from  the  genital  and  cardiac  regions,  and  which  in  most 
are  distant,  in  some  degree  resembling  the  letter  H,  in  this  species  coalesce  on  the 
median  line,  forming  a  single  deep  hollow ;  and  thus  the  outlines  of  the  genital  and 
cardiac  regions  are  placed  far  apart,  whilst  the  branchial  regions  closely  approach  each 
other.  The  front  has  three  rounded  lobes,  of  which  the  middle  is  the  longest.  The 
tooth  over  the  inner  canthus  of  the  orbit  is  obtuse,  and  rather  less  prominent  than  the 
frontal  lobes.  The  tooth-like  process  of  the  basilar  joint  of  the  external  antenna  forms 
an  obtuse  angle.  The  legs  are  very  long ;  the  third  joint  of  the  second  pair  extending 
considerably,  and  even  that  of  the  first  in  some  degree,  beyond  the  edge  of  the  carapax. 
They  are  wholly  without  spines ;  nor  are  they  hairy  in  any  of  the  specimens  I  have 
seen,  with  the  exception  of  the  last  joint  of  the  four  posterior  pairs.  The  first  pair  is 
thick  and  strong,  and  its  surface  smooth.  A  simple  carina  extends  along  the  carpus, 
terminating  in  an  angular  projection  ;  and  a  similar  carina  occupies  the  upper  edge  of 
the  hand,  on  the  outer  surface  of  which  are  five  longitudinal  lines  of  impressed  dots, 
but  without  any  elevation.  The  sides  of  the  four  posterior  pairs  of  legs  are  also  marked 
with  lines  of  impressed  dots ;  and  the  last  joint  of  each  is  furrowed  at  the  sides,  and 
has  a  longitudinal  crest  of  hair  on  the  upper,  and  two  on  the  lower,  edge.  The  last 
joint  of  the  abdomen  in  the  male  forms  an  equilateral  triangle. 
Colour  above  light  red,  indistinctly  dotted  with  yellow  ;  beneath  yellowish.  Tips  of 
the  claws  blackish. 
Length  3^  inches,  breadth  6. 
The  only  specimens  which  I  have  seen  of  this  species  were  brought  by  Mr.  Cuming 
from  Valparaiso,  where  they  are  taken  by  nets  in  deep  water  :  the  claws  are  considered 
a  great  delicacy,  and  the  fishermen  are  in  the  habit  of  breaking  them  off,  and  then 
throwing  the  animals,  still  alive,  again  into  the  water. 
The  indigenous  name  is  Boco. 
2.  Cancer  Edwardsii. 
Tab.  XLIV. 
Cane,  testa  granulatd ;  margine  antico-laterali  decem-lobato,  lohis  latis,  contiguis,  profunde 
dentatis ;  manibus  supra  obsolete  tuberculoso-carinatis ;  maris  abdominis  articulo  ul- 
timo antice  producto. 
Hab.  apud  Valparaiso.  (Cuming.) 
6  Mus.  Soc.  Zool.     S  ?  Mus.  Bell. 
