SYSTEMATIC LIST OF LOWER PALAOZOIC FOSSILS. 
341 
S Page at | 
which de- | 
seribed | 
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. 
208 
208 
HEMITHYRIS (continued). 
_— nasuta (M°Coy). 
Upper Lala, 68. 
Jack nucula (Sow. Sp.) 
| Upper Ludlow, 59—18—181—265— 
| 31—163—139. 
| Aymestry limestone, 229. 
Ludlow Group, 194—92—75. 
Lower Ludlow, (84)—(150)—185— 
136. 
Wenlock shale, (84)—(150)—(15). 
Bala Group, 21—(15). 
| — pentagona (Sow. Sp.) 
Upper Ludlow, 118*. 
Wenlock shale, 55. 
— ?pisum (Sow.) 
Wenlock limestone, 262. 
— rotunda (Sow. Sp.) 
Upper Bala, 5. 
— sphwroidalis (M*Coy). 
Upper Ludlow, 118+. 
Wenlock limestone, 91—135. 
— Stricklandi (Sow. Sp.) 
Aymestry limestone, 229. 
— subundata (M°Coy). 
Upper Bala, 171—205—4. 
— upsilon (Bar. Sp.) 
Upper Bala, 217. 
— Witlsoni (Sow. Sp.) 
Upper Ludlow, 31. 
Aymestry limestone, 229. 
Lower Ludlow, 215—136. 
Wenlock limestone, 262. 
Wenlock shale, 79. 
PENTAMERUS. 
— galeatus (Dal. Sp.) 
Ludlow Group, 194. 
Lower Ludlow, 101—136. 
Wenlock limestone, 91—262—265. 
— globosa (Sow. Sp.) 
Wenlock shale, (126). 
Bala Group, 16—(126). 
209 
209 
209 
210 
211 
211 
213 
213 
214 
214 
215 
Genera and Species, with the localities represented by the 
numbers of the preceding List, under each 
Geological Group. 
PENTAMERUS (continued). 
— Knighti (Sow.) 
Aymestry limestone, 12—229—265— 
118}. 
Lower Ludlow, 1836—101. 
— levis (Sow.) 
Caradoc sandstone, 232—120. 
Upper Bala, 217—199—54—30. 
— lens (Sow. Sp.) 
Upper Bala, 62—170. 
— microcamerus (M°Coy). 
May Hill, 172. 
Upper Bala, 170. 
— oblongus (Sow.) 
Caradoe sandstone, 2—120—118 — 
215¢. 
Upper Bala, 108—40. 
— undatus (Sow. Sp.) 
Upper Bala, 171—205—108—170— 
199. 
PORAMBONITES (Pand.) 
— intercedens (Pand.) 
Bala Group, 266. 
ORTHIS. 
— Actonie (Sow.) 
Caradoc sandstone, 2. 
Upper Bala, 7—103—19 a—254—158 
—167—35—28—211—76— 62 — 
116—219—26—171—125—122. 
— biloba (Linn. Sp.) 
Upper Bala, 46. 
— callactis (Dal ) 
Bala Group, 266. 
Upper Bala, 13—99. 
— calligramma (Dal.) 
Caradoe sandstone, 118. 
Upper Bala, 19a — 50 — 62 — 107 — 
158—39—122. 
Lower Bala, 243. 
— — Var. a. calliptycha (M°Coy). 
Upper Bala, 153. 
* See previous note, at foot of page 340. 
+ See note at foot of preceding page. 
{ The Caradoc sandstone, near this spot, has not been noted in the list of localities. 
