148 



NEW YORK STATE MUSEUM 



Camarotoechia (?) indianensis Hall 



Page 46 



26, 27 Two views of a gutta-percha squeeze from a natural impres- 

 sion. Natural size. Lower Shelby bed (N. Y. State 

 Museum) 



Camarotoechia (?) neglecta Hall 



Page 45 



28-30 Three views of a specimen, natural size. Rochester (Arey 

 collection) 

 31 View of the ventral valve of an excellently preserved typical 

 specimen. X2. Rochester (Arey collection) 



Whitfieldella nitida Hall 



Page 44 



32, 36, 37 Three views of a broad and flat specimen, an internal cast, 



showing pallial sinuses on pedicle valve. X2 



33. 34. 35 Three views of a higher and thicker specimen. X2. Roches- 



ter (Arey collection) 



Monomorella noveboracum sp. nov. 



(See plates 2 and 3) 

 Page 39 



38 Internal cast of a very high pedicle valve with extremely long 

 platform vaults. Natural size. Lower Shelby bed (N. Y. 

 State Museum) 



