1246 NEW YORK STATE MUSEUM 



PLATE 4 



Macrochilina hamiltoniae mut. pygmaea nov. 



Page 912 * 

 1 An internal cast. xl3. Moscow N. Y. 



Diaphorostoma (?) 

 2, 3 Apical and lateral views. xl3. Canandaigua lake, N. Y. 



Macrochilina hebe Hall mut. pygmaea nov. 



Page 912 



4 Lateral view. xl3. Moscow N. Y. 



Pleurotomaria itys Hall (?) mut. pygmaea nov. 



Page 913 



5 Lateral view. xl3. Canandaigua lake, N. Y. 



Pleurotomaria capillaria Conrad mut. pygmaea nov. 



Page 912 



6 Lateral view. xl3. Canandaigua lake, N. Y. 



Diaphorostoma (?) 

 7, 8 Views of shells whose specific relations are uncertain. 

 x25. Canandaigua lake, N. Y. 



Diaphorostoma lineatum Conrad mut. belial Clarke 



Page 911 

 9 Lateral view. xl3. Canandaigua lake, N. Y. 



Loxonema delphicola Hall mut. moloch Clarke 



Page 913 



10 A fragment. x3. Moscow N. Y. 



Tentaculites gracilistriatus Hall mut. asmodeus Clarke 



Page 913 



11 A view of the shell. xl3. Livonia shaft, N. Y. 



Bactrites? sp. mut. pygmaeus nov. 

 Page 915 

 12, 13 Two views of an internal cast. xl3. Canandaigua 

 lake, N. Y. 



Orthoceras scintilla Hall ( ?) mut. mephisto Clarke 



Page 915 

 14 Lateral and septal views. Natural size. Canandaigua 

 lake, N. Y. 



