94 PALEOZOIC PALEONTOLOGY. 
throughout, and three well-defined faunal zones may be recognized, 
all of them being represented in the Nearpass section. The lowest of 
these life zones is especially characterized by Dalmanites dentatus ; 
the second is characterized by Orbiculoidea jervensis, and the third 
by the great abundance of Spirifer murchisoni, although this species 
also occurs in both of the lower zones. 
In the descriptive part of the present report the fauna of the 
Dalmanites dentatus zone has been treated as a unit, there being at 
least a doubt as to whether it should be included in the Oriskany. 
The faunas of the two higher zones, on the other hand, have been 
described all together, as it is believed that no one will question the 
Oriskany age of both. In the present discussion of the faunas, how- 
ever, each of these faunal zones will be treated by itself, in order 
that its characteristics and relationships may be more easily discussed. 
The Dalmanites dentatus Zone. 
Locality 2A**—In the Nearpass section the beds bearing the 
Dalmanites dentatus fauna form the crest of the high ridge to the 
northwest of the Nearpass quarry. They are a southern extension of 
the beds which form the crest of the ridge in New York State, east 
of Tri-States, which has been called “the trilobite ridge” by those 
who have collected in that region. The species of fossils which have 
been, identified from this locality are as follows: 
Vermipora serpuloides Hall. 
2. Orbiculoidea ampla (Hall). 
3. Lingula sp. undet. 
4. Stropheodonta magnifica (Hall). 
5. Stropheodonta sp. undet. 
6. Leptena rhomboidalis (Wilck.). 
7. Chonostrophia jervensis Schuchert. 
8. Dalmanella subcarinata (Hall). 
9. Dalmanella perelegans (Hall). 
10. Rhynchonella bialveata Hall. 
11. Rhynchotrema formosum (Hall). 
12. Rensselaria subglobosa n. sp. 
13. Spirifer murchisoni Castel. 
14. Spirifer nearpassi n. sp. 
15. Cyrtina rostrata Hall. 
pea 
