548 INDEX 



Ptychaspis — Continued. ' page 



ceto Walcott. listed, Ch'ang-hia 68 



Ch'au-mi-tien 68 



stratigraphic and geographic position 49 



spp. undt. Walcott, listed, Ch'ang-hia 68, 337 



Ch'au-mi-tien 68 



stratigraphic and geographic position 49 



Ptychoparia Corda, associated with Crepicephalus coosensis 206 



Vanuxeviella nortia 223 



cited, Lena limestone 72 



compared with Acrocephalites ? glomeratus 179 



Acrocephalites ? ma jus 180 



Asaphiscus 382 



Asaphiscus / fionis 392 



Crepicephalus 200 



Menomonia 162 



Norwoodid3e 168 



Saratogia 195 



(r= Conocephalitcs'typus). listed, Ciiina 6 



listed 292, 403 



Meagher limestone 271 



represented, China, North America and Europe 59-60 



Upper Cambrian characterized by 42 



aclis Walcott, listed, Man-t'o, Shan-tung 61 



stratigraphic and geographic position 47 



cf. adamsi (Billings), listed 317 



f batia Walcott (= Chuangia bella), generic references 15 



.? bromus (= Ptychoparia (Emmrichclla) bromus), generic refer- 

 ences 15 



ecus Walcott (^ Liostracina krausei), generic references 15 



synonymous species of Walcott 8 



coiiius Walcott (=Anoniocarella coiiuts). generic references 15 



constricta (=: Ptychoparia (Eniiiirichclla) coistricta), generic ref- 

 erences 16 



ccekanowskii von Toll, correlated with Levisia agenor (Walcott) . . 72 



(^= Inouyia) , listed, Siberian Cambrian 8 



diadcmata (Hall), included by error with Saratogia wisconscnsis 



(Owen) 251 



compared with Saratogia 195 



dryopc Walcott (^ Conokephalina f dryopc). generic references.. 16 



fitchi Walcott, listed 317 



granosa Walcott {^zz Ptychoparia granulosa), generic references.. 16 



listed, Man-t'o, Shan-tung 61 



stratigraphic and geographic position 47 



granulosa Walcott {=■ Ptychoparia granosa), generic references. ... 16 



impar Walcott, stratigraphic and geographic position 47 



impar var. ? Walcott. stratigraphic and geographic position 47 



inflata (^ Inouyia ? intiata), generic references 16 



