675 



Plat. 



Platyceras paralium. White & Whitfield. Proc. Boston 

 Soc. Nat. Hist. Vol 8, 1862. Kinderhooh limestone {Suhcar- 

 honiferous) of the Mississippi valley. (Name means, '' that 

 grows by the seaside." S. A. Miller.) In Pennsylvania re- 

 ported abundant in the LeBceuff conglom^erate {3d oil sand) 

 of the Erie county quarries, and characteristic of that stratum, 

 by I. C. White, Report Q4, pp. 110, 249. — Upper Chemung^ if 

 not Catskill. VIII-IX. 



P. patulum^ Hall ; pentalohus^ Hall ; perlatum^ Hall ; per- 

 plexu7n^ Hall ; perplicatum^ Hall ; pileiforme^ Hall ; piso^ 

 Walcott. (S. A. Miller, 1890.) 



Platyceras parasiticum, attached to Cromyocrinus sim- 

 plex^ which see for figure. 



Platyceras platystoma, Hall. Pal. N. Y. Vol. 3, 1859, 



FIAO, 



Hall, PaLIVy, Vol: Hi I8^6L 



page 326, plate 60, fig. 1<^, right side, iS, cast, preserving im- 

 pressions of plications; 2, irregularity at apex, plications only 

 shown on one side ; plate 61, fig. la, left back side, crushed on 

 upper side. (Other figs, omitted.) In Delthyris shaley lime- 

 stone of the Lower Helderherg, VL — With it occurs its variety^ 

 alveatum. Hall.) In Pennsylvania, Olaypole's catalogue 



