FORMATIONS OF ORDOVICIAN AGH. 
. Protowarthia cancellata (Hall) (f 
. Lophospira medias U. & S. (r 
Orthoceras sp. undet. (Ge 
Proetus latimarginatus n. sp. (rv 
Enerinurus trentonensis Wale. (r 
. Plerygometopus callicephalus (Hall) (£ 
174 A®™”. Dark, fossiliferous limestone. 
1. Streptelasma cormeulum Hall (i 
2. Rhinidictya sp. undet. (Ge 
3. Strophomena incurvata (Shep. ) ( 
4. Rafinesquina alternata (EKmm.) (ae 
5. Plectambonites sericeus (Sow. ) (ec 
6. Dalmanella testudinaria (Dal.) (Gi 
7. Zygospira recurvirostris (Hall) (c 
8. Ctenodonta sp. undet. (Ge 
9. Bucania punctifrons Emm. (f 
10. Protowarthia cancellata (Hall) (c 
11. Holopea sp. undet. (ie 
12. Orthoceras sp. undet. (f 
13. [sotelus gigas De Kay (tv 
14. Proetus latimarginatus n. sp. (f 
15. Platymetopus trentonensis (Hall) (r 
16. Hncrinurus trentonensis Wale. (r 
17. Calymene senaria Con. (f 
18. Pterygometopus callicephalus (Hall) (£ 
174 A®®. Dark, fossiliferous limestone. 
1. Rafinesquina alternata (Kmm.) (Gaye 
2. Plectambonietes sericeus (Sow. ) (aye 
3. Dalmanella testudinaria ( Dal.) (©) 
4. Zygospira recurvirostris (Fall): (Gale 
5. Bucania punctifrons Emm. (Ga): 
6. Protowarthia cancellata (Hall) (ue 
7. Lophosmra medias U. & S. (ae\)e 
8. Orthoceras sp. undet. (Ge) 
9. Proetus latimarginatus n. sp. (ia) 
10. Encrinurus trentonensis Wale. (rey) s 
11. Calymene senaria Con. (eye 
12. Plerygometopus callicephalus (Hall) (7). 
leslie 
