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NEW YORK STATE MUSEUM 



Orbiculoidea sp., 49, 50. 



loclensis, 41, 42. 

 Orthis carinata, 52, 53. 



tioga, 49, SO, 52, S3- 

 Orthoceras sp., 49, 50. 



pacator, 4S- , 



Orthothetes chemungensis, 52, 53. 



Paleoneilo constricta, 52, 53. 



emarginata, 53. 



filosa, 40, 5-2, 53- 

 Paleoniscus devonicus, 46. 

 Paleotrochus praecursor, 45, 48. 

 Panenka sp., 42. 

 Paropsonema cryptophyum, 49. 

 Parrish limestone, 44-45, 55. 

 Phragmostoma natator, 45,-49. 

 Pleurotoraaria rugulataj 41, 42. 

 Plumalina plumariaj 45. 

 Polygnathus dubius, 46. 

 Portage group, term, 38. 

 Prattsburg shales and flags, 52-53. 

 Prioniodus erraticus, 46. 



spicatus, 46, 

 Probeloceras lutheri, 41, 45, 48. 

 Productella boydi, 52. 



hirsuta, 52. 



hystricula, 53. 



lachrymosa, 48, 49, 50, 52, 53. 



onusta, 53. 



speciosa, 52. 



spinulicosta, 49. 



Protonympha devonica, 49. 

 Pterinca cbennmgcnsis, 53. 

 Pterinopecten imbecilis, 52. 

 Pterochaenia fragilis, 41, 42, 45, 46. 



Rhinestreet shale, 45-47. 



Schizophoria imprcssa, 48, 49, 50, 52, 



53- 



tulliensis, 40. 

 Spathiocaris emersoni, 45, 46. 

 Spirifer disjunctus, 53. 



marcyi, 53. 



mesacostalis, 49, 50, 52, 53. 



mesastrialis, 52. 



mucronatus var. posterns, 48, 53. 

 Staudish shales and flags, 42, 43. 

 Stropheodonta cayuta, 50, 52, 53. 



demissa, 53. 

 Styliolina fissurella, 41, 45. 



Tichenor limestone, 38. 

 Tornoceras uniangulare, ^5. 

 Tropidoleptus carinatus, 52. 

 Tully limestone, 39-40, 54. 



Undulations of the strata, 54-55. 



West Mill flags and shales, 49-51. 

 West River black shale, 41-43. 



