136 TWENTY-SEVENTH EEP0BT ON THE STATE MUSEUM. 



The following species of this family have been described 

 from the Geological formations of New York : 



Goniatites bicostatus 



G. • Chemungensis 



G. Ch. var. equicostatus 



G. complauatus 



G. comp. var. perlatus 



G. discOideus 



G. (Clymenia ?) erato 



G. expansus=Cr. Marcellensis . 



G. mithrax 



G. Nundaia 



G. orbicella 



G. Patersoni 



G. uniangularis 



G. unilobatus . 



G. sinuosus 



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