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DR.  WHEELT0N  HIND  ON  THE  AFFINITIES  OF  [May  I  893, 
Remarks. — I  know  of  only  one  specimen  from  North  Staffordshire, 
a  right  valve,  from  the  cabinet  of  Mr.  J.  Ward,  E.G.S.  It  was 
evidently  described  by  Mr.  Etheridge  with  the  preconceived  idea 
that  the  shell  belonged  to  the  Anatinidae.  The  specimen  is  much 
broken  along  the  anterior  half  of  the  hinge-line,  and  on  a  cursory 
examination  a  fractured  fold  might  be  taken  for  a  central  umbo. 
On  a  closer  inspection  it  will  be  seen  that  more  anteriorly  the 
shell  has  disappeared,  and  left  the  cast  of  a  small  umbo  in  the 
normal  position  of  the  genus,  at  the  junction  of  the  anterior  and 
middle  thirds.  I  figure  another  specimen  from  the  cabinet  of 
Sir  IT.  K.  Shuttleworth,  with  the  kind  permission  of  that  gentle¬ 
man.  This  fossil  is  in  a  better-preserved  condition  than  the 
type-specimen,  and  shows  both  valves  lying  open,  displaying  the 
characteristic  posterior  border  and  shape  of  the  shell ;  it  has  a 
more  pronounced  ridge  than  the  crushed  type,  and  the  umbones 
are  seen  to  be  at  L  length  of  the  hinge-line  from  the  anterior  end. 
In  the  Geol.  Surv.  Mem.  of  the  Country  round  Bolton,  p.  35, 
Salter  notes  the  occurrence  of  Anthracomya  sanguinolaris,  MSS.,  in 
the  Ganister  series  of  Burrs,  half-a-mile  north  of  Bury.  He  had 
seen  Mr.  Wild’s  specimen,  and  named  it  Orthonota  (?)  or  Sanguino- 
lites  (?) ;  I  am  unable  to  find  any  specimen  bearing  the  name 
A.  sanguinolaris ,  and  hazard  the  conjecture  that  it  may  have  been 
a  specimen  similar  to  that  described. 
Localities. — Holly  Lane  Coal,  roof,  Adderley  Green,  North 
Staffordshire  ;  Low  Baton  Bed,  Fulledge,  Burnley,  Lancashire. 
[Anthracomya  minima,  sp.  nov.,  Wheelton  Hind.  (PI.  IX.  figs.  11 
and  12.) 
Anthracomya ,  undescribed  forms,  Salter,  Geol.  Surv.  Mem.,  ‘  Iron  Ores  of 
South  Wales,’  pi.  ii.  figs.  1,2,  3. 
Specific  Characters. — Shell  triangular,  very  small.  The  hinge-line, 
if  produced,  would  meet  the  inferior  border  at  an  acute  angle. 
Anterior  end  short,  tumid,  border  rounded.  Posterior  expanded 
and  flattened  into  the  borders,  behind  an  oblique  obtuse  swelling, 
which  passes  from  the  umbones  towards  the  posterior-inferior  angle. 
The  posterior  border  is  obtusely  rounded  below,  sloping  rapidly 
upwards  into  the  hinge-line.  The  hinge-line  is  a  little  more  than 
half  the  length  of  the  shell ;  the  umbones  are  small,  situated  about 
-1-  length  of  the  hinge-line  from  the  anterior  end.  The  inferior  border 
is  nearly  straight,  very  slightly  sinuated  about  the  centre. 
The  shell  is  constricted  by  an  oblique  groove  anterior  to  the 
oblique  swelling,  and  is  marked  by  fine  lines  of  growth. 
Interior  casts  show  the  arrangement  of  muscle-scars  as  in  other 
species  of  the  genus. 
When  young,  the  shell  is  more  elongate,  and  not  so  triangular ; 
it  appears  to  grow  in  an  oblique  direction  towards  the  posterior 
border. 
Size. — Antero-posterior  measurement,  9  mm.  (about  |  inch) ; 
dorso-ventral,  4  mm.  (about  ^  inch)  :  lateral,  3  mm.  (about  ^  inch). 
