538 INDEX 



PAGE 



North American fauna, omission, Chinese 59 



North Granville, New York, Lower Cambrian locality 38a 317 



North Greenwich, New York, Lower Cambrian locality 33 317 



North Lake, Waukesha County, Wisconsin 150 



nortia, see Vanuxemella. 



Norwoodia, new genus, described 168 



association 161 



genotype, Norwoodia gracilis Walcott 168, 169 



geographic distribution 169 



observations 169 



stratigraphic range 169 



gracilis, new species, described 169 



figured, pi. 27, figs. 2, 2a-g 236 



compared with Norwoodia saifordi 171 



Norwoodia simplex 171 



Norwoodia tenera 170 



discussed 168, 169 



formation and locality 170 



observations 170 



ponderosa, new species, described 171 



figured, pi. 28, figs, i, la-h 238 



compared with Norwoodia simplex and A^. saifordi 171 



formation and locality 171 



saffordi, new species, described 171 



figured, pi. 27, figs, i, la-f 236 



compared with Norwoodia gracilis 171 



Norwoodia ponderosa 171 



Norwoodia simplex 171 



formation and locality 171 



simplex, new species, described 171 



figured, pi. 27, figs. 3, ^a-b 236 



compared with Norwoodia gracilis and A'', saffordi 17 1 



Norwoodia ponderosa 171 



Norwoodia tenera 172 



discussed 168, 169 



formation and locality 171 



tenera, new species, described 172 



figured, pi. 28, figs. 2, 2a-g 238 



compared with Norwoodia gracilis 170 



Norwoodia simplex 172 



discussed 168, 169 



formation and locahty 172 



Norwoodidae, new family, described 168 



compared with Ptychoparia, Calymenidae, and the Phacopinae. 168 



Nostocaceae, Algonkian algal cells resembling 103 



Notch Peak formation, Upper Cambrian locality 30W 227 



Nothozoe ?, listed, Indo-China 13, 62 



nundina, see Obolus. 



Nunkoweap Valley, Arizona, ^Middle Cambrian locality 74 184, 374, 424 



