466 



INDEX 



PAGE 



Naraoidse, new family, described 175 



classification of 154 



nasuta, see Levisia. 



nasutus, see Conaspis and Conocephalites. 



Nathorst, Alfred G., generic name Nathorstia in honor of 194 



specific name given in honor of 57 



nathorsti, see Peytoia. 



Nathorstia Walcott, new genus discussed 194 



as a generalized trilobite 163 



classification of 154 



no living representatives 165 



transitans Walcott, new species described 194 



figured, pi. 28, fig. 2 216 



appendages of 195 



compared with Malaria spinifera 195 



relation to Malaria spinifera 191 



stratigraphic position and association 153 



Nebalia, representing Phyllocarida 162 



compared with Hymenacaris 165 



Nebaliacea, carapace of 157 



Nebaliopsis typica Sars, compared with Tuzoia 165 



compared with Tusaia retifera 187 



reticulated surface of carapace of 158 



Neolenus, appendages of 190 



caudal rami of 191 



rami of 159 



serratus (Rominger), appendages of 190, 191 



figured, pi. 6, figs. 1,2 38 



pi. 45, figs. 1-4 296 



associated with Peytaia natharsti 57 



compared with Sidneyia inexpecians 20, 27 



Protichnites tracks left by 277 



resemblance to Waptia fieldensis 191 



stratigraphic position and association 153 



Nephthydidae, suggested by Pikaia gracilens 132 



nereis, see Anomocare and Ptychoparia. 



Nevada, Calvinella tenuisculpta from .Pogonip limestone of 359 



locality of Saukia niarica in, discussed 361 



Lower Ordovician locality 201a 359 



possible fragments of Dikelacephalus minncsotcnsis 370 



Upper Cambrian locality 62 near Adams Hill 361 



locality 66, Dunderberg mine 362 



Ncvadia, in Lower Cambrian and later faunas 157 



weeksi, occurrence in southwestern Nevada 13 



New Jersey, Blairstown, fauna of " Kittatinny " limestone 255 



Hardyston quartzite, Upper Cambrian locality lie 270 



Lower Ozarkian locality lie at Newton 362 



New Lisbon, Wisconsin, Upper Cambrian locality 99c 262-300 



" New Lower Cambrian subfauna " 309 



