SYSTEMATIC LIST OF LOWER PALAXOZOIC FOSSILS. 
339 
Page at | 
which de- 
scribed 
above. 
Genera and Species, with the localities represented by the 
numbers of the preceding List, under each 
Geological Group. 
Page at 
which de- 
scribed 
above. 
Genera and Species, with the localities represented by the 
numbers of the preceding List, under each 
Geological Group. 
167 
167 
168 
168 
168 
169 
170 
170 
173 
i\CALYMENE (continued). 
— parvifrons (Salt.) 
Lower Bala, 240. 
— tuberculosa (Salt.) 
Upper Ludlow, 117. 
Lower Ludlow, 101. 
Caradoe shale, 52. 
HOMALONOTUS. 
— bisulcatus (Salt.) 
Caradoc sandstone, 2. 
Upper Bala, 7—167—218—38. 
— Knighti (Konig.) 
Upper Ludlow, 245. 
Wenlock shale, 173. 
— rudis (Salt.) 
Upper Bala, 38. 
ISOTELUS. 
— affinis (M°Coy). 
Upper Tremadoc slate, 251. 
— laticostatus (Green Sp.) 
Wenlock shale, 165. 
Upper Bala, 220—30. 
— Powisi (Murch.) 
‘ Upper Bala, 154—26—218—7—197. 
— tyrannus (Murch. Sp.) 
Upper Bala, 141—71—107—188— 
250. 
ILLAENUS. 
— crassicauda (Dalman*). 
Bala Group, 29. 
— Davisi (Salt.) 
Upper Bala, 220—160—154—211. 
— latus (M°Coy). 
Bala Group, 266. 
Lower Bala, 131. 
— Rosenbergi (Kichw.) 
Upper Bala, 62—239—19a—182. 
DISPLANUS. 
— centrotus (Dal. Sp.) 
Upper Bala, 154—141. 
174 
174 
175 
187 
189 
188 
188 
190 
190 
192 
FORBESIA. 
— latifrons (M°Coy). 
Ludlow Group, 259. 
— Stokesi (Murch. Sp.) 
Wenlock limestone, 135. 
EURYPTERUS. 
— cephalaspis (Salt.) 
Upper Ludlow, 130. 
PTERYGOTUS. 
— lepto-dactylus (M*Coy). 
Lower Ludlow, 136. 
PSEUDOCRANIA. 
— divaricata (M°Coy). 
Upper Bala, 28—211. 
Lower Bala, 243. 
ORBICULOIDEA. 
— implicata (Sow. Sp.) 
Ludlow Group, 194. 
Wenlock shale, (126). 
Upper Bala, (126). 
SIPHONOTRETA. 
— Anglica (Morris). 
Lower Ludlow, 238. 
|— micula (M°Coy). 
Upper Bala, 197—260—203. 
DISCINA. 
— Morrisi (Davidson). 
Lower Ludlow, 136. 
— rugata (Sow. Sp.) 
Upper Ludlow, 18—265—31—163— 
214, 
— *striata (Sow.) 
Upper Ludlow, 18. 
SPIRIFERA. 
— biforata (Schlot.) 
— — Var. a. lynx (Kichwald Sp.) 
Upper Bala, 7—205—28—116—167 
—211—168—383. 
— — Var. 8. dentata (Pand. Sp.) 
Upper Bala, 62—54—219. 
* See note at foot of page 336. 
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