552 



PAGE 



Resser, Charles E., acknowledgments 79 



Rhabdocyathus sibiriciis, listed, Siberian Cambrian 8 



Richthofen, Ferdinand von, bibliographic references 74 



cited, Chinese Cambrian 3, 5, 7 



Dorypyge richthofeni, Wu-lo-pu 7 



Paleozoic of China 4 



richthofeni, see Billingsella, Dorypyge, Olenoides (Dorypyge), and 

 Stephanocare. 



River Junction, Houston County, Minnesota, Upper Cambrian locality 84a 167 



River water, composition of, table 90 



robusta, see Coosia. 



Rock Falls, Dunn County, Wisconsin, Upper Cambrian locality 83a 



163, 192, 209 



Rocky Mountain province, distinct from Asian subprovince 70 



Roddy, H. Justin, acknowledgments 219, 258 



Rogersville, Tennessee, Upper Cambrian locality 102a 399 



Upper Cambrian locality 121a 399 



locality 123b 392, 398, 399, 401 



125 near 392, 398, 399 



Rohrerstown, Lancaster County, Pennsylvania, Lower Cambrian locality 



1 2x near 220 



Rome, Floyd County, Georgia, Upper Cambrian locality 96c near 170 



Upper Cambrian locality I38d near 172 



Rome formation, Tennessee, Middle Cambrian localities 2)2>7 



Middle Cambrian locality 9 371 



Rothpletz, August, correction of reference to Walcott's Helena section... 285 



determination of genera and species 293 



epeirogenetic unconformities 288 



genera and species, with notes by Walcott 293 



identified Cambrian as pre-Cambrian 280 



interpretation of Weed's Cambrian 281 



memoir by 260 



paleontological evidence, discussed by Walcott 295 



reasons for non-discovery of pre-Cambrian 282 



reconnaissance conclusions 296 



section of Mount Helena, discussed 277 



vital mistake in correlations of 277 



Walcott's conclusions on 296 



and Weed, Cambrian sections of, compared 281 



rotundatus, see Bathyuriscus. 



Round Lake, Onondaga County, New York, calcareous deposits 86 



rugosa, see Helcionella and Stenotheca. 



Rustella edsoni var. pentagonalis Rothpletz, discussed by Walcott 293 



interpretation by Rothpletz 291 



saifordi, see Nor-woodia. 



Sai-ma-ki, Manchuria, species from, listed 6 



St. Croix Falls, Polk County, Wisconsin, L^pper Cambrian locality 82. .. . 192 



