INDEX 469 



PAGE 



Nevadia zveeksi 257, pi. 23, figs. 1-7 ; text figs. 14 and 15 ; pi. 44, fig. i 



anterior glabellar lobe in 242 



compared with Elliptocephala asaphoides 260 



Mesonacis vertnontana 260 



mentioned 246, 249, 295, 300 



stratigraphic distribution tabulated 251 



newberryi, see Eo or this. 



nisus, see Micromitra. 



Nisusia, classification of 142, 147 



evolution of pi. 11 (pp. 140-141) 



mentioned 97 



reasons for referring species to it 98 



Nisusia alberta, compared with Nisusia rara 97 



stratigraphic position and association 210, 2II 



Nisusia festinafa, compared with Nisusia rara 97 



compared with Nisusia (Jamesclla) loivi 98 



mentioned 318 



stratigraphic position and association 214, 215 



thin section of p. 164, pi. 12, fig. 2 



Nisusia rara, new species 97> pi- 9, figs. 13 and 130 



compared with Nisusia alberta 97 



Nisusia festinata 97 



Nisusia (Jamesella) classification of 142, 147 



evolution of pi. 11 (pp. 140-141) 



mentioned 97 



reasons for referring species to it 97 



Nisusia (Jamesella) amii, stratigraphic position and association 189 



Nisusia (Jamesella) erecta, mentioned 345 



Nisusia {Jamesella ?) kanabensis, new species, described, not figured 97 



Nisusia (Jamesella) loivi, new species 98, pi. 9, fig. 14 



compared with Nisusia festinata 98 



stratigraphic position and association 212, 213 



Nisusia (Jamesella) nautes, compared with Eoorthis thyone 106 



stratigraphic position and association 180, 196 



Nisusia (Jamesella) spencei, stratigraphic position and association 180 



Nisusiinse, classification of 142 



defined 147 



nitens, see Linnarssonella. 



North American continent in pre-Cambrian time, elevation of 252 



North Attleboro, fossils from 241 



North Weymouth, fossils from 281, 284 



Notch Peak formation, correlated 171 



defined 9 



fossils in 63 



section of I73-I7S, pi. 14 



notchensis, see Obolus (Westonia). 



Nounan formation, correlated 171 



defined 6 



section of ,,. X93 



