192 



PALEONTOLOGY OF NEW YORK. 



be found which present any material variation from the type of Camarotuochia. 

 Therefore, with our present Itnowledge, all the species definitely referred to 

 Stenoschisma in Volume IV of the Palaeontology of New York, may tentatively 

 be embraced under this new term, that is : 



In the Corniferous limestone : 



Rhynchonella Tethys, Billings. 

 Rhynchonella? Billingsi, Hall. 



In the Hamilton group : 



Rhynchonella Sappho, Hall. 

 Rhynchonella Horsfordi, Hall. 

 Rhynchonella congregata, Conrad. 



In the Chemung group : 



Rhynchonella eximia, Hall. 

 Rhynchonella Stephani (or 



Stevensi), Hall. 



Rhynchonella Carolina, Hall. 

 Rhynchonella Sappho, Hall. 



Rhynchonella prolifica, Hall. 

 Rhynchonella Dotis, Hall. 

 Rhynchonella carica. Hall. 



Rhynchonella duplicata, Hali. 

 Rhynchonella contracta, Hall. 

 Rhynchonella orbicularis, Hall. 



The type was continued further upward into the early faunas of the Lower 

 Carboniferous, where it is represented in the Waverly group by some of the 

 species already named, R. Sappho, R. contracta,* and R. Sageriana and R. Marshall- 

 ensis, A. Winchell. 



* According to the identifications by Prof. C. L. Herrick, Bull. Laboratories Denison University, vol. iii, 

 pp. 39, 40. 1888. 



