671 



Plat. 



Platyceras magnificum, Hall. Pal. N. Y. Vol. 3, 1861, 



Hcdi 



page 476, plite 119, figs. 1 a^ 6, young shell; 6 a, 5, large speci- 

 men, symmetrical and well-preserved; with the whorls free 

 except at the extreme tip, and figured natural size. Oriskany 

 sandstone of New York. — In Penna. found by I. 0. White in 

 Montour Co., Cooper township. Grove's tunnel, in Oriskany 

 sandstone. (G7, p. 86, 297 ) Claypole's spec. 95-1.— VII. 



Platyceras minutissimum. Walcott. Potsdam Fauna, 



(J C y^T^^-'s^^ W/5 r Saratoga Co., N. Y., 1888, 



UCyTH- . .^ HV figs. 6, 7. See Bull. U. S. 



G. S. page 62. — Upper 

 Cambrian {Potsdam) for- 

 mation. To be sought in 

 Pennsylvania along the 

 north and west side of the 

 y^^'^iA^^'-^ /888 South Mountains.— /. 



