FORMATIONS OF ORDOVICIAN AGE. 
9. Lophospira owen U. & S. 
10. Isotelus gigas De Kay 
11. Bumastus trentonensis (Kmm.) 
12. Ceraurus pleurexanthemus Green 
13. Pseudospherexochus trentonensis Clark (r). 
14. Pterygometopus sp. undet. 
15. Leperditia fabulites (Con.) 
Ge) 
(f). 
(c). 
(f). 
(vr). 
(c). 
174 At, Soft, bluish-gray limestone, similar to the last. 
. Undet. bryozoan 
. Lingula sp. undet. 
. Rafinesquina alternata (Kmm.) 
. Dalmanella subequata (Con.) 
. Undet. pelecypod fragments 
. Isotelus gigas De Kay 
. Leperditia fabulites (Con.) 
CaS) | — 
<F GS Ot -H OO 
(r). 
(t). 
(a). 
(c). 
(1). 
(T). 
(T). 
174 A¥. Soft, bluish-gray limestone, similar to the last. 
Hy Ac? 
174 A™ 
174 At® 
1. Hindia parva Ul. 
2. Streptelasma corniculum H. 
3. Rhinidictya sp. undet. 
4. Strophomena incurvata (Shep.) 
5. Dalmanella subequata (Con.) 
6. Scenidium anthonensis Sard. 
%. Bumastus trentonensis (Emm.) 
8. Leperditia fabulites (Con.) 
. Hard, bluish-black limestone. 
1. Romingeria? trentonensis n. sp. 
2. Bucania sp. undet. 
3. Bumastus trentonensis (Hmm.) 
. Pterygometopus sp. undet. 
. Leperditia fabulites (Con.) 
ov eS 
. Hard, dark gray, granular limestone. 
1. Crinoid stems 
2. Bumastus trentonensis ( Emm.) 
. Hard, bluish-black limestone. 
1. Leperditia fabulites (Con.) 
ad 
(f). 
(t). 
(c). 
(r). 
(ie) 
(f). 
(r). 
(r). 
(r). 
(T). 
(c). 
(1). 
(c). 
(ae) 
(v). 
(T). 
al 
4 ft. 
8 ft. 4 in. 
PY SRE ney) dL 
Ib ai 
