I 50 NEW YORK STATE MUSEUM 



ChV Uncinulus mutabilis Hall 



Ch U. abruptus Hall 



SW Stenocisma formosum Conrad 



CV Eatonia medialis (Vanuxem) 



HCVW E. peculiaris (Conrad) 



V E. singularis (Vanuxem) 



HV E. whitfieldi Hall 



H E. sinuata Hall 



CV Anastrophia verneuili Hall? 



CV Coelospira concava Hall 



CSVW C. dichotoma Hall 



V C. acutiplicata Hall 



HCVSW . . . . Leptocoelia flabellites (Conrad) 



V Trematospira costata Hall 



CV T. multistriata Hall 



Ch T. perforata Hall 



V T. sp. n. 



V Rhynchospira formosa Hall 



V Parazyga deweyi Hall 



HCSV Meristella lata Hall 



CV M. vascularia Clarke 



Ch M. princeps Hall 



CV M. lentiformis Clarke 



Ch M. laevis Hall 



W M. princeps Hall 



Ch M. bella Hall 



SV Nucleospira elegans Hall 



V N. ventricosa Hall 



Ch Atrypa reticularis Linne 



HCSVW . . . . Spirifer arenosus (Conrad) 



SV S. cyclopterus Hall 



CSVW S. murchisoni Casielnau 



W S. plicatus (Wetter) 



V S. tribulis Hall 



W S. nearpassi Weller 



CV S. saffordi Hall 



S S. modestus Hall 



