Ab 
alts 
12. 
13. 
14. 
15: 
16. 
aie 
18. 
19. | 
The association of species in this list indicates a mingling of the 
Black River forms, such as Leperditia fabulites and Dalmanella suba- 
guata, with those from the lower zone of the Trenton, as Streptelasma 
corniculum and Rhynchotrema inequivalvis. The specimens were all 
collected from loose blocks of limestone, which were doubtless origi- 
nally derived from the upper Black River and the lower Trenton beds. 
Locality 153 A.—This locality lies about two miles southwest of 
Stillwater and about one-quarter of a mile from Mud. pond.* 
PALEOZOIC PALEONTOLOGY. 
i. Plectaumbonites sericeus (Sow.). 
Strophomena incurvata (Shep.). 
Dalmanella testudinaria (Dal.). 
Dalmanella subequata (Con.). 
Rhynchotrema inequivalris (Castel. ) 
Oxydiscus sp. undet. 
Telicotoma sp. undet. 
Camaroceras proteiformis (Hall). 
[sotelus gigas De Kay. 
Bumastus trentonensis (Emm.). 
Bumuastus elongatus n. sp. 
Platymetopus trentonensis (Hall). 
Calymene senaria Con. 
Leperditia fabulites (Con.). 
following list of species were collected : 
Receptaculites occidentalis Salter. 
Streptelasma corniculum Hall. 
Nyctopora billingsi Nich. 
Romingeria? trentonensis n. sp. 
Actinostroma trentonensis n. sp. 
Prasopora simulatria Ulr. 
. Rafinesquina alternata (Kmm.). 
Plectambonites sericeus (Sow.). 
Strophomena incurvata (Shep.). 
. Dinorthis pectinella (EKmm.). 
Dalmanella testudinaria (Dal.). 
. Dalmanella subequata (Con.) 
Clenodonta nasuta (Hall). 
. Hormotoma salteri Ulr. 
[ears 
Tsotelus gigas De Kay. 
* Locality A, Map No. 10, p. 60, loc. cit. 
