372 STEVENSON 



rentis Jieldcrbergicc, Leptcena rhojiiboidalis, StropJicodo7ita beckii, 

 Orthotlietcs woohvortJiana, Rhipidomella oblata, Dalnianclla siib- 

 cariiiata^ Spirifer inacropleura, S. cyc/optcnis, S. perlaniellosiis^ 

 Meristella arciiata, Eatoiiia incdialis, Stenochisma formosa^ Un- 

 cimdus micleolatiis, Platyceras elongatmn^ PJiacops logani, Dal- 

 Diaintes and Liclias in fragments. Orthocei^as fragments are 

 many but obscure. 



4. The Scutella Limestone 



Resting upon the shales closing the Delthyris is a Hmestone, 

 eight feet thick, light blue, slightly granular and containing vast 

 numbers of crinoidal stems, whose white color contrasts mark- 

 edly with the blue of the rock. For two feet at the bottom this 

 Scutella limestone is in layers one to two inches thick, but, 

 above, it becomes more nearly massive. It forms the lower part 

 of the upper limestone cliff, which stands out on both sides of 

 the valley to a short distance above Davis' dam, about two miles 

 and a half above Schoharie village. This cliff is less conspicuous 

 than that below, as the rock is less resistant, but its place is dis- 

 tinct. The most notable fossils are the shield-like bodies of As- 

 pidocrinus sciitclliforniis, which in some cases are almost three 

 inches in diameter. The stems accompanying them are from 

 one-fifth to one-third of an inch in diameter, but they can hardly 

 belong to Scutella, as in that form the pit for attachment is very 

 small. Other fossils are abundant, most of them forms which 

 are found in the Delthyris. The brachiopods, except Atrypa 

 rcticulatus, usually have the valves separated. 



5. The Upper Pentamerus Limestone 



This has been united by Professor Hall with the Scutella 

 under the name of Becraft limestone, as the two limestones appear 

 to be hardly distinct enough in some other localities to deserve 

 separate names. In the Schoharie area, however, they are 

 easily distinguished by the color of the fresh surface, although 

 the weathered surface shows no difference. The Upper Penta- 

 merus forms the upper portion of the second cliff on both sides 

 of the valley and can be reached at many places up to its disap- 



