40 PALEOZOIC PALEONTOLOGY. 
11. Strophomena incurvata (Shep.). 
12. Dinorthis pectinella (Emm.). 
13. Platystrophia biforata (Schl.). 
14. Dalmanella testudinaria (Dal.). 
15. Dalmanella subequata (Con.). 
16. Parastrophia hemiplicata (Hall). 
17. Rhynchotrema inequivalvis (Castel.). 
18. Cyclonema montrealensis Bill. 
19. Lsotelus gigas De Kay. 
20. Calymene senaria Con. 
With the single exception of Platystrophia bvforata, which has been 
found in situ elsewhere only near the top of the Trenton limestone, 
in the Jacksonburg secton, this entire fauna is strongly lower Trenton 
in aspect. The limestone at this locality, from which the fossils were 
collected, is more nearly in sifw than in most of the Trenton localities 
studied, and there is but little doubt that the species all occurred 
together, in which case it must be assumed that Platystrophia biforata 
does, at times, but not often, occur in the lower Trenton beds. The 
fossils were collected from the higher beds exposed at the locality, the 
lower strata being highly conglomeritic with pebbles derived from 
the subjacent Kittatinny limestone. The Hudson River slates outcrop 
only a short distance above the limestone stratum bearing the fossils, 
and it seems probable that the shale deposition began somewhat earlier 
than usual at this locality. 
Locality 114 .A.—The next locality is about one-half mile from 
Swartzwood station, on the west side of the road to Swartzwood.* At 
this point the lower Trenton beds have been faulted in between masses 
of the older Kittatinny limestone, the beds being greatly sheared and 
the fossils being much distorted. The following species have been 
recognized : 
1. Receptaculites occidentalis Salter. 
2. Streptelasma corniculum Hatt. 
Nw! 
. Rhinidictya sp. undet. 
4. Rafinesquina alternata (iemi.). 
5. Orthis tricenaria Con. ; 
6. Dalmanella subequata (Con.). 
i. Modiolopsis sp. undet. 
8. Helicotoma sp. undet. 
9. Orthoceras sp. undet. 
* See locality marked 6, on Map No. 8, p. 54, loc. cit. 
