350 
BRITISH PALALOZOIC FOSSILS. 
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320 
321 
321 
322 
322 
Genera and Species, with the localities represented by the 
numbers of the preceding List, under each 
Geological Group. 
es 
CYCLOCERAS (continued). 
— Ibex (Sow.) 
Upper Ludlow, 18—127. 
Upper Bala, 62—130. 
— subannulatum (Miinst. Sp.) 
Upper Ludlow, 23. 
Upper Bala, 62—30—58—114. 
— tenuiannulatum (M°Coy). 
Upper Ludlow, 23. 
Aymestry limestone, 12. 
Lower Ludlow, 136. 
— tracheale (Sow. Sp.) 
Upper Ludlow, 163—130—236—18. 
Lower Ludlow, (84). 
Wenlock shale, (84)—123. 
Wenlock or Bala Group, 15. 
POTERIOCERAS. 
— ellipticum (M°Coy). 
Aymestry limestone, 12. 
— pyriforme (Sow. Sp.) 
Aymestry limestone, 12. 
PHRAGMOCERAS. 
— intermedium (M°Coy). 
Lower Ludlow, 136. 
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324 
Genera and Species, with the localities represented by the 
numbers of the preceding List, under each 
Geological Group. 
PHRAGMOCERAS (continued). 
— ventricosum (Sow.) 
Lower Ludlow, 101. 
LITUITES. 
— articulatus (Sow.) 
Lower Ludlow, 101. 
Wenlock shale, (261). 
Upper Bala, (261). 
— cornuarietis (Sow.) 
Upper Bala, 62. 
TROCHOLITES. 
— anguiformis (Sow. Sp.) 
Upper Bala, 184. 
— planorbiformis (Conrad). 
Upper Bala, 78. 
HORTOLUS. 
— giganteus (Sow. Sp.) 
Lower Ludlow, 101—136. 
Upper Bala, 30. 
— Ibex (Sow. Sp.) 
Upper Ludlow, 117. 
Ludlow Group, 259. 
Wenlock limestone, 135. 
