306 
PEOF.  T.  E.  JONES  ON  PALAEOZOIC  OSTEACODA  [Aug.  1 893,. 
4.  Beyrichia  Kloedeni ,  M‘Coy  (p.  218). 
5.  Cythere  \Pontocypris  ?]  aldensis,  M‘Coy  (p.  216). 
P.  232.  ALdens.  Referred  to  the  Bala  beds. 
(5) .  Cythere  [ Pontocypris ?]  aldensis  (M‘Coy,  p.  216). 
6.  - [ - ] - ,  var.  major ,  Jones  (p.  216). 
7.  - [ - ]  Gray  ana,  Jones  (p.  217). 
8.  - [ - ]  Wrightiana,  Jones  &  Holl  (p.  217). 
9.  Primitia  Barrandiana ,  Jones  (p.  220). 
10.  Aparchites  Maccoyii  (Salter).  See  Ann.  Mag.  hi at.  Hist.,  July 
1868,  p.  56  ;  and  ibid.  May  1889,  for  Aparchites ,  gen.  nov. 
P.  232.  Hillside,  near  Blair  Farm.  Referred  to  the  Upper  Silurian. 
11.  Entomis  globulosa ,  Jones  (p.  223). 
12.  Beyrichia  impendens,  Jones  (p.  219). 
(4). - Kloedeni ,  M‘Coy  (p.  218). 
(6)  Species  oe  Osteacoda  eeom  the  Whitehouse-Bay  Shales.1 
Of  Lower-Silurian  age. 
1.  Aparchites  leper ditioides ,  Jones.  PI.  XIII.  figs.  1-3. 
2.  - subovatus ,  Jones.  PI.  XIII.  figs.  4  and  5. 
3.  Primitia  elongata ,  Krause,  var.  nuda ,  nov.  PI.  XIII.  fig.  6. 
4.  - Krausei ,  sp.  nov.  PI.  XIV.  fig.  7. 
5.  - girvanensis ,  sp.  nov.  Pl.  XIII.  figs.  7-9. 
6.  -  Grayce ,  sp.  nov.  PI.  XIII.  fig.  10. 
7.  - mundmla ,  Jones,  var.  jimbriata,  nov.  PI.  XIII.  fig.  11. 
8.  - ,  var.  Kloedeniana ,  nov.  PI.  XIII.  figs.  12-15. 
9.  -  Ulricliiana ,  sp.  nov.  PI.  XIV.  fig.  1. 
10.  Beyrichia  Kloedeni,  M‘Coy ;  cast  of  a  tuberculate  valve. 
11.  - -  — ,  var.  infecta,  nov.  PI.  XIV.  fig.  2. 
12.  - - ,  varieties.  PI.  XIV.  figs.  3  and  4. 
13.  - impar ,  sp.  nov.  PI.  XIV.  fig.  5. 
14.  Ulrichia,  sp.  ?  PI.  XIV.  fig.  6. 
15.  - girvanensis,  sp.  nov.  PI.  XIV.  fig.  8. 
16.  Sulcuna  praecurrens,  sp.  nov.  PI.  XIV.  figs.  10  and  11. 
17.  Cypridina  Grayce,  sp.  nov.  PI.  XIV.  fig.  12. 
(c)  Species  eeoh  Baegany-Pond  Bijen.  Of  Llandovery  age. 
1.  Beyrichia  Kloedeni  (?),  M‘Coy,  small  cast. 
2.  - ,  M‘Coy,  var.  scotica,  Jones  &  Holl. 
3.  Ulrichia  Grayce,  sp.  nov.  PI.  XIV.  fig.  9. 
EXPLANATION  OF  PLATES  XIII.  &  XIV. 
(All  the  figures  are  magnified  about  25  diameters.) 
Plate  XIII. 
Figs.  1-3.  Aparchites  leper  ditioides,  Jones  Three  different  individuals. — Fig.  1, 
Left  valve ;  Fig.  2.  Eight  valve  ;  Fig.  3.  Right  valve. 
Figs.  4  &  5.  Aparchites  subovatus,  Jones.  Eight  valve. 
1  Not  mentioned  in  the  first  fasciculus  of  the  ‘  Monograph  Sil.  Foss.  Girvan,’ 
because  the  fossils  had  not  then  been  discovered. 
