SYSTEMATIC LIST OF LOWER PALAOZOIC FOSSILS. 
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Genera and Species, with the localities represented by the 
numbers of the preceding List, under each 
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Genera and Species, with the localities represented by the 
numbers of the preceding List, under each 
— trilobatus (Sow.) 
CYRTOCERAS. 
ORTHOCERAS. 
— baculiforme (Salt.) 
— Brighti (Sow.) 
— bullatum (Sow.) 
— centrale? (His.) 
— dimidiatum (Sow.) 
— filosum (Sow.) 
— laqueatum (Hall). 
Geological Group. nenibes Geological Group. 
BELLEROPHON (continued). ORTHOCERAS (continued). 
— Murchisoni (d@Orb.) 315 |— Ludense (Sow.) 
Upper Ludlow, 119. Lower Ludlow, 136. 
— ornatus (Conrad Sp.) 315 |— Mocktreense (Sow.) 
Bala Group, 244. Wenlock limestone, 135. 
— subdecussatus (M°Coy). 316 |— politum (M®Coy). 
Caradoc Group, 152. Bala Group, 105. 
Upper Bala, 7—182 316 |— primevum (Forb. Sp.) 
Wenlock shale, 73. 
Upper Ludlow, 236. Upper Bala, 80—90. 
Wenlockensis (Sow.) 316 |— semipartitum (Sow.) 
Wenlock limestone, 265. Upper Ludlow, 119. 
317 |— sub-undulatum (Portk.) 
— multicameratum (Hall). Upper Ludlow, 117—181. 
Lower Bala, 131. Lower Ludlow, 67—136—101. 
Wenlock limestone, 262. 
Wenlock shale, 55—151—123. 
— angulatum (Wah1 ) Caradoe sandstone, 177. 
Upper Ludlow, 93. Upper Bala, 62—58—11—30—114— 
Ludlow Group, 259. 260—90. 
Lower Ludlow, 101. 317 |— tenwicinctum (Portk.) 
Wenlock shale, 151. Upper Ludlow, 127—18—265. 
Upper Bala, 30. Lower Ludlow, (84). 
Wenlock shale, (84). 
Upper Ludlow, 23. Upper Bala, 62—58. 
317 |— tenuistriatum (Minst.) 
Wenlock limestone, 135. Upper Bala, 182. 
818 |— vagans (Salt.) 
Upper Ludlow, 139—134—236. Upper Bala, 62—160—220—76. 
Wenlock shale, 157. 318 |— ventricosum (Sharp Sp.) 
Upper Bala or Wenlock shale, 24. 
Upper Bala, 141. Upper Bala, 64—380. 
Upper Ludlow, 28—81. 
yee Ludlow, 136. CYCLOCERAS. 
319 |— annulatum (Sow. Sp.) 
Lower Ludlow, 136—101. Wenlock limestone, 135. 
Upper Bala, 30—58—62. W oolhope limestone, 193. 
— imbricatum (Wahl.) Caradoc shale, 52. 
Upper Ludlow, 180. Upper Bala, 62. 
Bala Group, 82. 
Upper Ludlow, 130. 319 |— arcuoliratum (Hall Sp.) 
Wenlock shale, (84). Bala Group, 266. 
Lower Ludlow, (84). 319 |— bilineatum (Hall Sp.) 
Upper Bala, 62—58. 
Bala Group, 10. 
