FORMATIONS OF 
3 
ORDOVICIAN AGE. 
174 A*®. Dark, fossiliferous limestone. 
1. Rafinesquina alternata (Emm. ) @y 
2. Plectumbonites sericeus (Sow.) Ce) 
3. Dalmanella testudinaria (Dal.) ((@)),. 
+. Zygospira recurvirostris (Hall) Gale 
5. Clenodonta nasuta (Hall) (Ge). 
6. Modiolopsis sp. undet. @). 
7. Bucania punctifrons Emm. (ae). 
8. Liospira micula (Hall) (Gin) 
9. Lophospira medialis U. & 8. (ie 
10. Proetus latimarqinatus n. sp. (dye 
11. Calymene senaria Con. (fe 
12. Pterygometopus callicephalus (Mall) (f). 
174 A**. Dark, sparsely fossiliferous limestone. 
1. Plectambonites sericeus ( Sow.) (iE))e 
2. Protowarthia cancellata (Wall) (G2)e 
3. Pterygometopus callicephalus (Hall) (1). 
174 A®*®. Dark, sparsely fossiliferous limestone. 
| 1. Plectumbonites sericeus (Sow. ) (ce). 
2. Zygospira recurvirostris (Hall) (Gee 
3. Modiolopsis faba (Con.) (ie)}e 
174 A**. Dark, sparsely fossilferous limestone. 
1. Rafinesquina alternata (Emm.) (r) 
2. Plectambonites sericeus (Sow. ) (c). 
3. Dalmanella testudinaria ( Dal.) (ae) 
+. Lophospira medialis U. & S. (1) 
5. Calymene senaria Con. (Gre 
6. Pterygometopus callicephalus (all) (7) 
174 A*®’. Dark, fossiliferous limestone. 
1. Rafinesquina alternata (Emim.) (c) 
2. Plectambomtes sericeus (Sow. ) (ec) 
3. Dalmanella testudinaria ( Dal.) (@) 
+. Zygospira recurvirostris (Tall) (at) 
5. Ctenodonta sp. undet. (1) 
6. Modiolopsis faba Con. (G8) 
tite co eume 
6 in. 
i qa. 
