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PALEONTOLOGY OF NEW YORK. 
be found which present any material variation from the type of Camarot(ECHIa. 
Therefore, with our present knowledge, 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. 
Rhynchonella Carolina, Hall. 
Rhynchonella Sappho, Hall. 
Rhynchonella prolijica. Hall. 
Rhynchonella Dotis, Hall. 
Rhynchonella carica. Hall. 
In the Chemung group; 
Rhynchonella eximia. Hall. 
Rhynchonella Stephani (or 
Stevensi), Hall. 
Rhynchonella duplicata. Hall. 
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. Marshatl- 
ensis, A. Winchell. 
* According to the identifications by Prof. C. L. Herrick, Bull. Laboratories Denison University, vol. iii, 
pp. 39, 40. 1888. 
