Index A77 



Pebbly sandstone, 31 



Pedicellariae, 112 



Pegmatite, 70 



Pegmatite, dikes or veins, 67, 71 



Pelagic realm, 79 



life in, 81 

 Pelecypods, 20, 229, 257, 261, 375, 381, 384, 386, 390, 391, 394, 



396, 397, 400, 402, 405, 408, 409, 423, 428, 436, 441 

 Pelican's foot, 98 

 Pennsylvanian period, 418 



climate, 424 



geology, 420 



life, 423 



New York formations, 424 

 Periwinkles, 86, 92, 93, 106, 111, 112, 114, 127, 128, 133, 134, 136. 



140, 163 

 Permian period, 418 



climate, 424 



geology, 421 



life, 423 

 Peterson, C. G. Joh., cited, 182, 451 

 Petricola, 158 

 Phyllite, 74 

 Piedmont deposits, 26 

 Pilsbry, H. A., cited, 182, 451 

 Pinching or lensing out of strata, 42 

 Pirsson, L. V., cited, 181, 451 

 Pirsson, L. V. & Knopf, A., cited, 451 

 Pirsson, L. V. & Schuchert, C, cited, 451 

 Pitching anticlines, 52 

 Pitching synclines, 52 

 Pittsford shale, 337 

 Plant and animal associations, 85 



along the shore, 115 

 Plant associations, 85 

 Plants, 82, 259, 441 



land, 423 

 Polyclads, 121 



Pope Hollow conglomerate, 425 

 Porosity of a rock, 42 



