NO. 9 NEW YORK POTSDAM-HOYT FAUNA 289 



DESCRIPTION OF PLATE 41 (Continued) 



PAGE 



Pelagiella hoyti (Walcotf) 266 



Fig. 17. (X6.) Side view of the type specimen. U. S. National 

 Museum Catalogue No. 23846. 



Matherella saratogcnsis (Walcott) 



Figs. 18 and 19. (X 2.) Anterior and posterior sides of the same shell. 

 U. S. National ]\Iuseum, Catalogue No. 23847. 



20. ( X 2.) Umbilical view of the shell illustrated bj^ figs. 18 



and 19. 



21, ( X2.) Anterior view of two whorls of a shell attached to 



the matrix. U. S. National Museum, Catalogue No. 23847. 



All the specimens illustrated on this plate, with the exception of 

 figs. I and 8-11, are from locality (76), Upper Cambrian, Hoyt Hme- 

 stone, Potsdam horizon, Hoyt's quarry, 4 miles (6.4 km.) west of 

 Saratoga Springs, New York. 



The specimen represented by figure i is from locality (76a), 

 Upper Cambrian, i mile (1.6 km.) north of Saratoga Springs, New- 

 York. 



