224 



PALEONTOLOGY OF NEW YORK. 



* 0. Macleodi, 



* 0. suba>quata, 



* 0. Minneapolis, 

 0. gibbosa, 



* 0. perveta, 



* 0. Stonensis, 



* 0. testudinaria, 



* 0. bellula, 



* 0. crispata, 



* 0. emacerata, 



* 0. Meeki, 



* 0. multisecta, 



* 0. elegantula, 



var. jiarva, 



* 0. elegantula, 



* 0. arcuaria, 



* O. concinna, 



* 0. perelegans, 



* 0. planoconvexa, 



* 0. quadrans, 



* 0. subcarinata, 



* 0. lenticularis,f 



* 0. lepida, 



* 0. infera, 



* 0. Leonensis, 



* 0. superstes, 



Whitfield. 

 Conrad 



N. H. WiNCHELL. 



Billings 



Conrad 



Safford 



Dalman 



Meek 



Emmons 



Hall 



Miller 



Meek 



Foerste 



Dalman- 



sp. nov 



Hall 



Hall 



Hall 



Hall 



Hall 



Vanuxem, non Wahlenberg, 



Hall 



Calvin 



Hall 



sp. nov 



Calciferous. 



Chazy — Trenton. 



Trenton. 



Trenton. 



Trenton. 



Trenton. 



Trenton — Hudson River. 



Hudson River. 



Hudson River. 



Hudson River. 



Hudson River. 



Hudson River. 



Clinton. 

 Niagara. 

 Niagara. ' 

 Lower Helderberg. 

 Lower Helderberg. 

 Lower Helderberg. 

 Lower Helderberg. 

 Lower Helderberg. 

 Upper Helderberg. 

 Hamilton. 

 Chemung. 

 Chemung. 

 Chemung. 



RHIPIDOMELLA, (Ehlert. 1890. 

 XL Group of Orthis Michelini, Leveille. 



* 0. circulus, Hall Clinton. 



* 0. uberis, Billings Anticosti. 



* 0. hybrida, Sowerby Niagara. 



* 0. assimilis. Hall Lower Helderberg. 



t The specitic name leniiculains having already been used for a species of Obthis, the name should be 

 changed to OrthU hntiformis, Hull. Hi;e Report of the Fourth Geological Disti-ict of New Yoik, page 175. 



