Yol.  49.J 
ANTHRACOPTERA  AND  ANTHRACOMYA. 
275 
Plate  X. 
Fig.  1.  Anthracomya  elongata.  Longton,  North  Staffordshire. 
1  a. - ,  profile. 
2-5,  9-12.  Anthracomya  elongata,  showing  variations  in  form, 
from  the  collection  of  Mr.  J.  Ward,  F.G.S. 
6.  Anthracomya  elongata,  showing  muscle-scars. 
7,  8. - ,  testiferous  specimens. 
13,  13  a.  Anthracomya  lanceolata.  Fenton,  North  Staffordshire. 
14,  14  a.  - obtusa.  Longton,  North  Staffordshire. 
15,  - -  angusta.  Bucknall,  North  Staffordshire. 
16,  16  a.  - carinata ,  wrinkled  specimen  from  Merthyr  Tydvil.  From 
the  Strickland  Collection,  Woodwardian  Museum,  Cambridge. 
17-19.  Anthracomya  pumila  ?,  probably  young  of  A.  elongata. 
28,  29. - Pitts  Hill. 
20,  20  a,  21.  Anthracomya,  senex.  Longton,  North  Staffordshire. 
22,  22  a.  Anthracomya,  ohovata..  Same  locality. 
;  23.  - sp.  ?  modiolaris.  Durham. 
1  24-26.  - modiolaris.  Bucknall,  North  Staffordshire. 
27.  - Phillipsii.  Type-specimen  from  Owens  College,  Manchester. 
30,  30  a.  - subcentralis.  Specimen  at  Owens  College,  Manchester. 
31.  - ?  scotica.  Ardwick  Limestone. 
No.  12 
Discussion. 
The  President  had  no  doubt  that  this  was  a  useful  piece  of 
palaeontological  work.  The  forms  of  life  described  by  the  Author  had 
not  received  the  attention  which  they  deserved.  An  alternation  of 
salt  and  freshwater  beds  in  the  Coal  Measures,  as  in  other  forma¬ 
tions,  was  easy  to  understand.  He  thought  that  the  Author  was 
probably  correct  in  referring  these  fossils  to  the  Unionidae,  and  spoke 
of  the  analogies  between  Anthracomya  and  Anodon. 
Mr.  B.  B.  Woodward  congratulated  the  Author  on  the  results  of 
his  labours  in  a  hitherto  much  neglected  corner  of  palaeontology. 
He  pointed  out  that  Fischer  had  placed  both  the  genera  in  question 
under  Myalina ,  but  had  included  that  group  in  the  Mytilidae.  The 
Author’s  proposal  to  separate  these  forms  from  the  Mytilidae,  and  to 
place  them  nearer  to  the  Unionidae,  would  receive  support  from  the 
fact  that  Dreissenia,  which,  like  Anthracoptera ,  closely  resembled  the 
Mytilidae  in  external  form,  had  lately  been  shown  by  its  anatomy  to 
be  a  near  ally  of  the  Unios.  He  hoped  Dr.  Wheelton  Hind  would 
extend  his  researches  to  Anthrcicosia  with  the  view  of  confirming  or 
correcting  Amalizky’s  recent  researches. 
Prof,  J.  F.  Blake  also  spoke,  and  the  Author  replied. 
