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 



3 2 i 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) 



