1240 NEW YORK STATE MUSEUM 



PLATE 1 



Pentremites leda Hall 

 Page 907 

 1 The only example of this species observed. x3. Csuisui 

 daigua lake, N. Y. 



Paracyclas lirata Conrad mut. pygmaea nov. 



Page 910 



2, 3 Side and dorsal view. xl3. Canandaigua lake, N. Y. 



Nucleospira concinna mut. pygmaea nov. 



[See pi. 2, fig.. 5] 

 Page 904 



4 Dorsal view of specimen figure 5, plate 2. xl3. Groig** 



ville N. Y. 



Leda rostellata Hall mut. pygmaea nov. 



Page 909 



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



6 Left valve. x!3. Greigsville N. Y. 



Nuculites oblongatus Conrad mut. pygmaeus nov. 



Page 909 



7 Cast of left valve. x8. Moscow N. Y. 



Palaeoneilo plana Hall mut. pygmaea nov. 



Page 909 

 8, 9 Views of an internal cast. x3. Livonia shaft, N. Y. 



Nucula corbuliformis Hall mut. pygmaea nov. 



Page 908 

 10, 11 Internal cast, dorsal and lateral views. x2. Livonia 



shaft, N. Y. 



Palaeoneilo constricta Conrad mut. pygmaea nov. 



Page 910 

 12, 13 Dorsal and left views of internal cast. xl3. Mos- 

 cow N. Y. 



Nucula lirata Hall mut. pygmaea nov. 



Page 908 

 14, 15 Oblique anterior and left lateral views. xl3. Livonia 

 shaft, N. Y. 



Nuculites triqueter Conrad mut. pygmaeus nov. 



Page 909 

 16, 17 Right and dorsal aspects of an internal cast. x!3. 



Moscow N. Y. 



