290 
PROF.  T.  R.  JONES  ON  SOME  PALAEOZOIC 
[Aug.  1893, 
3.  44  Beyrichia  WilcJcensiana  ”  and  44  Primitia  semicircularis  ”  are 
noted  by  Nicholson  and  Marr  (Quart.  Journ.  Geol.  Soc.  vol.  xlvii. 
1891)  in  their  memoir  on  the  Cross-Fell  Inlier,  at  pp.  505,  510, 
from  the  Corona-heds  ;  the  Beyrichia  at  “Pusgill;  Roman  Fell”; 
and  the  Primitia  at  44  Pusgill.”  See  further  on  for  a  note  on  these 
specimens. 
Nicholson  and  Marr,  op.  cit.  p.  507,  quote  44  Primitia  Maccoyii , 
Jones,  and  44  Cytheropsis  phaseolus,  His.,”  from  the  Keisley  Lime¬ 
stone.  P.  Maccoyii  (Salter)  is  now  placed  with  Aparchites ;  and 
Cythere  phaseolus ,  M‘Coy  (not  Hisinger),  is  a  synonym  for  the 
same  (Ann.  Mag.  Nat.  Hist.  July,  1868,  p.  56). 
4.  J.  E.  Marr.  44  The  Coniston  Limestone  Series.”  Geol.  Mag. 
dec.  3,  vol.  ix.  1892,  pp.  97  et  seqq. 
In  the  Sleddale  Group  : — 
P.  109.  Primitia  strangulata ,  Salter.  Applethwaite  ;  Stile  End. 
P.  108.  Beyrichia  complicate,  Salter.  Applethwaite ;  Coniston. 
The  specimens  labelled  44  Pusgill  ”  and  44  Dufton  ”  respectively, 
and  containing  the  Ostracoda  hereinafter  described,  consist  of 
a  dark-grey  or  nearly  black  limestone,  weathering  rusty,  and 
composed  of  small  and  fragmentary  organisms.  Two  pieces  col¬ 
lected  by  Prof.  H.  A.  Nicholson  in  1877  were  from  the  44  Dufton 
Shales  ”  (  =  Bala  Beds),  and  three  pieces  of  similar  limestone,  labelled 
44  Ordovician  {Trematis- corona  Beds;,  Pusgill,  Dufton,  Westmore¬ 
land,”  were  confided  to  me  by  Messrs.  Nicholson  and  Marr  in  1892. 
Although  44  Pusgill ;  may  more  particularly  refer  to  the  44  Corona- 
beds  ”  and  44  Dufton  ”’  to  the  44  Dufton  Shales,”  yet  Pusgill  is  near 
Dufton,  and,  as  both  of  these  formations  occur  in  it,  there  may  be 
some  forms  from  the  44Dufton  Shale”  among  those  marked  44 Pusgill.” 
[§  4.  The  appended  Table,  made  from  Mr.  J.  E.  Marr’s  notes,  shows 
the  Place  and  Order  of  Succession  of  the  Formations  referred 
to  in  this  Paper. 
e 
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03 
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£  . 
O  GO 
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In  the  Lake  District. 
Equivalent  Groups. 
Coniston  Grits  . 
Coniston  Flags  . 
Stockdale  Shales  . 
(  Ashgill  Shales  . j 
j  Staurocephalus-hmestoxiQ  . j 
■{  Xeisley  Limestone .  1 
j  Dufton  Shales  .  I 
(  Corona- beds  . J 
Rhyolitic  Group . 1 
Eycott  Group . j 
Skiddaw  Slates  . . . 
Lower  Ludlow. 
Lower  Ludlow  and  Wenlock. 
Llandovery. 
Upper  Bala  {Sedgwick). 
Caradoc  (or  Middle  Bala,  Sedg¬ 
wick). 
Llandeilo. 
Arenig. 
T.  R.  J.,  April  27th,  1893.] 
