22 
PALEOZOIC PALEONTOLOGY. 
174 A'®. Hard, bluish-black limestone. 
aL 
2. 
174 Al. Dark, bluish-gray or nearly black, irregularly 
Pterygometopus sp. undet. 
Leperditia fabulites (Con.) 
thin-bedded, knotty limestone. 
(Gs) 
(eye 
1. Streptelasma corniculum H. (a). 
2. Actinostroma trentonensis n. sp. (eye 
3. Crinoid stems (c). 
4, Rhinidictya sp. undet. (@): 
5. Schizocrania filosa (H.) (Gays 
6. Strophomena incurvata (Shep.) (r). 
7. Rafinesquina alternata (Kmm.) (Ge 
8. Plectambonites sericeus (Sow.) (£):. 
9. Orthis tricenaria Con. (ce): 
10. Dalmanella subequata (Con.) (ey 
11. Dalmanella testudinaria (Dal.) (rE)e 
12. Dinorthis pectinella (EKmm.) (ee 
13. Plectorthis plicatella (Hall) (Ge))s 
14. Rhynchotrema inequivalvis ( Castel.) (a). 
15. Zygospira recurvirostris (H.): Gae 
16. Cyrtodonta canadensis Bill. (a). 
1%. Isotelus gigas De Kay @): 
18. Bumastus trentonensis (Emm.) (vr). 
19. Encrinurus trentonensis Wale. (ae 
20. Pterygometopus callicephalus (H.) (t). 
21. Leperditia sp. undet. (r)% 
174 A238. Bluish-gray, granular, highly fossiliferous lime- 
stone. 
. Streptelasma cormeculum H. 
. Prasopora simulatria Uly. 
. Rafinesquina alternata (Kmm.) 
. Plectambonites sericecus (Sow.) 
. Orthis tricenaria Con. 
. Plectorthis plicatella (Hall) 
. Dalmanella testudinaria ( Dal.) 
. Rhynchotrema inequivalvis ( Castel.) (£). 
. Isotelus gigas De Kay 
. Proetus brevimarginatus Nn. sp. 
. Pterygometopus callicephalus (H.) (1). 
(ee 
(Gal) 
(Gale 
(a). 
(x). 
(c). 
(TE) 
(f). 
(z)e 
7 ft. 6 in. 
15 ft. 
