Lower Helderberg Rocks of Port Jervis, etc. 295 



From (2) : — Favosites in great quantities, the species not 

 authoritatively determined, but said by excellent judges to be 

 very like F. JViagarensis ; Chcetetes Helderbergia (?),* Fa- 

 vosites Helderbergia, crinoidal fragments, and Stromatoporse, 

 species not known to me. There occur also 8trop>hodonta 

 varistriata rare, Atrypa reticularis (?) one specimen, and 

 Pentamerus galeatus thick. 



From (3) : — *Dalmanites pleuroptyx, * Pentamerus gale- 

 atus very thick, StropJiodonta varistriata, Favosites. 



From (4) : — *Dahnanites pleuroptyx, *Phacops Logani, 

 Lichas pustulosus, * Tentacidites elongatus, *Pterinea sp., 

 Spirifer perlamellosus, * S. macropleurus , S. modestus, S. cy- 

 clojiterus, Rensselceria mutabilis, * Merista levis, Eatonia me- 

 dialis, E. singularis, Trematospira midtistriata, Stropho- 

 donta Beckii, *S. punctulifera, Stropliomena rhomboidalis, 

 Lepimna concava, Orthis midtistriata, O.- oblata, Lingula 

 sp., * Streptelasma stricta, Chcetetes Helderbergia, some other 

 species not determined, and many weathered out corals. 



From (5) : — This subdivision, Upper Pentamerus, begins 

 at bottom with a very hard calcareous layer, which has been 

 extensively quarried for farmers' lime at Buckley's Quarry, 

 one mile north-east of Bennet's Quarry. From this layer 

 Prof. Hall has identified for me a Phacops, a Platyceras 

 retrorsum, and a RJiynchonella ventricosa. From this hard 

 layer, strata of soft shale rise above each other in a nearly 

 perpendicular craggy ridge, between two and three hundred 

 feet in height, capped on the top with the highly fossiliferous 

 layers already mentioned. This ridge shows best in the 

 neighboring state of New Jersey, and was undoubtedly 

 seen near Bennet's Quarry by Mather and Horton, when 

 making the Geological Survey of this portion of the First 

 District. As it is long and low, I prefer to call it Tri- 

 lobite Ridge. That portion of it lying between the hard, 

 gray, calcareous layer at the bottom, and the hard, fossilifer- 

 ous layers at the top, is little known to me : but wherever 

 tested, I have generally found it unfossiliferous. The top 



