MR.  T.  BELL  ON  THE  GENUS  CANCER. 
341 
the  antepenultimate  and  terminal  joints  longitudinally  furrowed ;  the  nail  small  and 
slender. 
The  colour  of  this  pretty  species  is  a  light  lively  red  above,  with  several  curved  lines 
of  white  spots  over  the  branchial  and  hepatic  regions,  a  white  lengthened  spot  on  each 
side  of  the  genital  region,  and  a  white  mark,  like  a  V,  over  the  intestinal.  The  anterior 
feet  are  of  a  darkish  red  above,  the  remaining  legs  dotted  with  purpHsh  red.  The  under 
side  is  whitish. 
The  carapax  of  the  female  is  less  broad  in  proportion  than  that  of  the  male,  and  as 
usual  more  elevated  ;  but  I  do  not  observe,  in  the  numerous  specimens  in  my  posses- 
sion, that  considerable  difference  which  Say  describes  as  being  sufficient  to  occasion 
some  hesitation  whether  they  belong  to  the  same  species.  The  spots  on  the  carapax 
are  indeed  much  less  distinct  in  the  female,  but  they  are  sufficiently  obvious  in  every 
specimen  which  I  have  seen  of  that  sex. 
Length  2^  inches,  breadth  4. 
5.  Cancer  Pagurus,  Auct, 
Leach,  Mai.  Pod.  Brit.,  Tab.  X. 
Cane,  testa  granulatd  ;  margine  antico-laterali  decem-lobato,  lobis  quadratis,  contiguis,  inte- 
gris ;  manibus  Icsvibus. 
Hob.  ad  oras  Magnse  Britannise  et  Europse  Occidentalis. 
Carapax  transversely  oblong,  flattened,  but  little  higher  in  the  middle  than  at  the 
sides,  somewhat  rounded  before  and  behind  ;  the  surface  minutely  granulated,  smooth, 
with  the  regions  but  slightly  marked.  Latero-anterior  margin  slightly  recurved,  di- 
vided into  ten  quadrate  lobes,  the  sides  of  which  are  contiguous,  and  the  margins 
entire  ;  the  last  lobe  inconspicuous,  and  passing  into  the  posterior  marginal  line,  which 
terminates  immediately  anterior  to  the  posterior  transverse  ridge.  Front  trifid,  the 
teeth  of  nearly  equal  length  and  size.  Orbits  round,  with  a  strong  triangular  tooth 
over  the  inner  canthus,  which  does  not  project  so  far  as  the  front ;  and  a  smaller  one 
filling  the  space  between  the  two  superior  fissures.  External  antenn(B  with  the  basilar 
joint  much  elongated,  and  terminating  forwards  in  an  obtuse  tooth ;  the  first  joint  of 
the  moveable  portion  club-shaped,  the  second  cylindrical,  the  remaining  portion  seta- 
ceous. Internal  antenna  directed  forwards,  the  anterior  half  doubled  directly  back- 
wards in  a  state  of  rest.  The  basilar  joint  broad,  cup-shaped,  its  outer  edge  project- 
ing forwards ;  the  second  joint  (the  first  of  the  moveable  portion)  cylindrical,  the 
penultimate  with  a  small,  hooked,  and  recurved  process  at  the  apex.  Pedipalps  as  in 
the  rest  of  the  genus.  Sternum  minutely  punctated,  and  furnished  with  small  patches 
or  lines  of  short  scanty  hair.  Abdomen  in  the  male  with  the  margin  fringed  with  short 
hair ;  the  last  joint  forming  an  equilateral  triangle.  Anterior  feet  large,  robust,  smooth, 
without  spines  or  tubercles,  minutely  granulated,  the  hand  rounded,  without  crest,  the 
VOL.  I.  2  z 
