INDEX 



133 



utahensis, 34 

 walcotti, 28 

 wichitaensis, 33 



ectypa, Burnetia, 82 

 edwardsi, Burnetia, 84 

 electra, Kingstonia, 47 

 elegans, Bynumia, 52 

 Elkia, 79 

 Ellipsocephaloides, 62 



argutus, 63 



bearensis, 65 



briscoensis, 63 



butleri, 66 



carus, 65 



curtus, 62 



declivis, 67 



monsensis, 66 



montis, 65 



nitela, 66 



sawbackensis, 64 



silvestris, 64 

 elongata, Arapahoia, 45 



Tsinania, 40 

 elongatus, Illaenurus, 40 

 Elvinia, 26, 94 



brevifrons, 98 



bridgei, 97 



granulata, 96 



gregalis, 96 



longa, 97 



matheri, 95 ' 



missouriensis, 96 



montis, 94 



roemeri, 96, 97 



ruedemanni, 95 



tetonensis, 94 



utahensis, 95 



vagans, 98 

 Enontioura, 42 



typicalis, 43 

 eumus, Bynumia, 52 

 eurekensis, Parairvingella, 26 

 Eurekia, 41 

 exilis, Burnetia, 81 

 extensa, Burnetia, 81 



flohri, Irvingella, 24 



gibba, Irvingella, 13 

 goodsirensis, Drumaspis, 30 



gracilens, Chariocephalus, 9 

 granulata, Elvinia, 96 

 granulosus, Taenicephalus, loi 

 grata, Pterocephalina, 78 

 gregalis, Elvinia, 96 



hamburgensis, Parairvingella, 27 

 Hesperaspis, 43 

 highlandensis, Platycolpus, 41 

 holmesi, Taenicephalus, 100 

 hybrida, Maryvillia, 71 

 hyrumensis, Taenicephalus, 104 



idahoensis, Drumaspis, 29 

 Iddingsia, 79, 85 



alpersensis, 88 



anatina, 89 



bicincta, 87 



crassimarginata, 87 



missouriensis, 86 



nevadensis, 85 



(?) quinnensis, 88 



simplicitas, 89 



utahensis, 85 

 Illaenurus, 38 



albertensis, 38 



elongatus, 40 



priscus, 38 



(?) sinclairensis, 39 

 intermedia, Burnetia, 80 



Parairvingella, 27 

 Irvingella, 2, 3, 13 



abrupta, 21 



accincta, 21 



adamsensis, 24 



agrestis, 17 



alberta, 23 



alia, 16 



alta, 19 



(Parairvingella) angustilimbatus, 26 



arbucklensis, 14 



arctica, 13 



ardmorensis, 18 



bacca, 20 



burnetensis, 20 



davisensis, 16 



deckeri, 19 



flohri, 24 



gibba, 13 



media, 22 



