146 



no. 



I 



NEW YORK STATE MUSEUM 

 PLATE 4 



Cornulites arcuatus Conrad 



Page 105 



Internal cast of a stout, rapidly tapering specimen. Natural 



size. Rochester (Arey collection) 

 Internal cast of a slender, slightly arcuate specimen from a 



gutta-percha squeeze of a natural impression. Natural size. 



Lower Shelby bed (N. Y. State Museum) 

 A specimen with slightly different character of the annula- 



tions. X2. Rochester (Arey collection) 

 A specimen retaining part of the shell and natural surface. 



Upper Shelby bed (N. Y. State Museum) 

 An internal cast of a large specimen. Natural size. Rochester 



Crania sp. 



Page 38 



Single specimen observed. X2. 



Rochester (Arey collection) 



