Vol.  49.] 
OSTRACODA  PROM  WESTMORELAND. 
295 
§  6.  List  oe  Species  of  Lower-Paleozoic  Ostracoda  from 
the  Lake  District. 
Including  the  forms  mentioned  in  the  preceding  pages,  the  fol¬ 
lowing  Lower-Palaeozoic  Ostracoda  have  been  described  and  figured 
as  having  occurred  in  North-eastern  Westmoreland  : — 
1.  Aparchites  Maccoyii  (Salter).  Keisley  Limestone. 
2.  - subovatus,  sp.  nov.  et  var.  Dufton  and  Staurocephalus- 
limestone,  Billy  Beck. 
3.  — ■ —  subtruncatus ,  sp.  nov.  Pusgill. 
4.  - leperditioides,  sp.  nov.  Pusgill. 
5.  Primitia  strangulata  (Salter).  Dufton  Syke;  Applethwaite ; 
Stile  End. 
6.  - protenta  (?),  Jones.  Appletreeworth  Beck  (Sleddale 
Group). 
7.  - centralis ,  Ulrich.  Pusgill. 
8.  - mundula,  Jones.  Pusgill ;  StaurocephalusAimQstone, 
Billy  Beck. 
9.  - ,  Jones,  var.  Tonga,  nov.  Pusgill. 
10.  - ,  Jones,  var.  producta,  nov.  Staurocephalus- lime¬ 
stone,  Billy  Beck  and  Swindale. 
11.  Beyrichia  complicata,  Salter.  Applethwaite;  Coniston. 
12.  - impendens  (?),  Jones.  Appletreeworth  Beck  (Sleddale 
Group). 
13.  JJlrichia  Nicholsoni,  sp.  nov.  Pusgill. 
14.  - Marrii,  sp.  nov.  Dufton. 
15.  JEchmina  obtusa ,  sp.  nov.  Pusgill ;  Dufton  Shales  (?). 
EXPLANATION  OF  PLATE  XII. 
[All  the  figures  are  magnified  25  diameters.] 
Fig.  1.  Primitia  centralis,  Ulrich,  a,  left  valve  ;  b,  edge  view  ;  c,  end  view. 
Figs.  2  &  3.  Primitia  mundula,  Jones.  Eight  valves;  3  distorted. 
Fig.  4.  Primitia  mundula,  J ones,  var.  longa,  nov.  a,  right  valve  ;  b,  edge  view. 
Figs.  5  &  6.  Primitia  mundula,  Jones,  var.  jproducta,  nov.  aa,  right  valve ; 
bb,  edge  view. 
Fig.  7.  Aparchites  subovatus,  sp.  nov.  Left  valve. 
Fig.  8.  Aparchites  subovatus,  sp.  nov.,  var.  a,  left  valve  ;  b,  edge  view  ;  c,  end 
view. 
Fig.  9.  Aparchites  subtruncatus,  sp.  nov.  a,  right  valve  ;  b,  edge  view  ;  c,  end 
view. 
Fig.  10.  Aparchites  leper ditioides,  sp.  nov.  a,  left  valve  ;  b,  edge  view ;  c,  end 
view. 
Figs.  11-14.  Cytherella  subparallela,  sp.  nov.  11.  a,  right  valve;  b,  edge  view ; 
c,  end  view.  12.  Carapace,  showing  the  left  valve.  13.  a,  left 
valve ;  b,  edge  view.  14.  a,  carapace,  showing  the  left  valve  ;  b, 
edge  view. 
Fig.  15.  Ulrichia  Nicholsoni,  sp.  nov.  Eight  valve. 
Fig.  16.  Ulrichia  Marrii,  sp.  nov.  Eight  valve. 
Figs.  17  &  18.  Mchmina  obtusa,  sp.  nov.  17.  a,  right  valve ;  b,  edge  view ; 
c,  end  view.  18.  Left  valve. 
