134 



INDEX 



mesleri, 15 



oblonga, 17 



ottertailensis, 17 



plena, 18 



(Irvingellina) protuberans, 5, 13 



rccurva, 15 



richmondensis, 23 



silvestris, 13 



tuniifrons, 25 

 Irvingellina, 3, 13 

 Irvingelloidcs, 2, 3 



jucunda, P.crkeia, 93 



kindlci, iJIountia, 60 



Kingstonia, 51 

 Kingstonia, 47, 60 



ara, 51 



bosworthcnsis, 48 



electra, 47 



kindlei, 51 



loperi, 50 



niucro, 48 



(?) plena, 50 



promissa, 49 



robsonensis, 49 



sullivanensis, 49 



thea, 2 



vulgata, 50 

 Komaspidae, 2 

 Komaspidella, 2 

 Komaspis, 2, 3 



libertyensis, Taenicephalus, loi 

 lingula, Burnetia, 82 

 longa, Elvinia, 97 

 loperi, Kingstonia, 50 

 Maryvillia, 70 



Alacelloura, 43 



transversa, 43 

 magnus, Chariocephalus, 11 

 maladensis, Taenicephalus, 102 

 marjumensis, Maryvillia, 69 

 Maryvillia, 67 



alberta, 70 



hybrida, 71 



loperi, 70 



marjumensis, 69 



mentis, 71 



moosensis, 72 



utahensis, 68 



violaensis, 68 



wyomingensis, 67 

 inatheri, Elvinia, 95 

 maxwelli, Drumaspis, 31 

 media, Irvingella, 22 

 mesleri, Irvingella, 15 

 Meteoraspis, 72 



banffensis, 72 

 niissouricnsis, Berkeia, 94 



Bynumina, 59 



Elvinia, 96 



Iddingsia, 86 

 modesta, Bynumia (?), 55 

 modestus, Taenicephalus, 104 

 mollis, Bynumia, 56 

 monsensis, Ellipsocephaloides, 66 

 montis, Chariocephalus, 10 



Ellipsocephaloides, 65 



Elvinia, 94 



Maryvillia, 71 

 moosensis, Maryvillia, ^2 

 mucro, Kingstonia, 48 



nevadensis, Berkeia, 91 



Cholopilus, 36 



Iddingsia, 85 

 nitela, Ellipsocephaloides, 66 

 nitida, Drumaspis, 34 

 Norwoodella, 43 

 notha, Pterocephalina, ^^ 



oblonga, Irvingella, 17 

 uklahomensis, Bynumiella (?), 58 



Platycolpus, 40 

 ornatus, Taenicephalus, 102 

 osella, Drumaspis, 32 

 ottertailensis, Irvingella, 17 



Parairvingella, 4, 13, 25 



angustilimbata, 26 



eurekensis, 26 



hamburgensis, 27 



intermedia, 27 

 pealei, Taenicephalus, 99 

 peloris, Chariocephalus, 5 

 pennsylvanica, Burnetia, 84 

 plana, Blountia, 60 



