220 



INDEX. 









PAGE 







PAGE 



Palseoneilo 



... 140 



Pecteu interstitialis . . . 



94 



— earbouifera 



... 142 



— 



Jouesii 



129 



■ — lirata 



... 143 



— 



Kuockouuieusis 



84 



Paracyclas 



162 



— 



Kokcharofi 



94 



— du Noyeri 



... 163 



— 



liueatus 



80 



Parallelodon ... 



164 



— 



Losseni 



80 



— angustus 



... 137 



— 



macrotis 



84 



divisus 



22 



— 



meleagriuoides 



62 



elegans . . . 



135 



— 



micropterus ... 



73 



— elougatus 



... 138 



— 



Murchisoui 



98 



Haimeanus 



... 136 



— 



nobilis 



90 



normalis 



136 



— 



orbiculatus 



83 



Pecteu sequalis 



... 90 



— 



ottouis... 



70 



— anisotus 



104 



— 



ovatus 



98 



arenosus 



... 70 



— 



papyraceus 



... 51 



— Batlius 



... 118 



— 



pera 



78 



— bellis ... 



... 84 



— 



Phillipsiauus ... 



... 90 



Bouei 



... 94 



— 



plauicostatus ... 



123 



— cancellatulus ... 



... 90 



— 



plauoelathratus 



91 



— cmgendus 



... 108 



— 



plicatus 



69, 73 



— clatliratus 



... 82 



— 



prseteuuis 



106 



— ccelatus 



... 70 



— 



quinquelineatus 



93 



- cognatus 



... 90 



— 



rugulosus 



70 



- concavus 



... 54 



— 



scalaris 



86 



— concentrico-striatus ... 



... 70 



— 



Sedgwicki 



101 



— couoideus 



37 



— 



segregatus 



94 



- cousiniilis 



104 



— 



semicircularis ... 



113 



- deoruatus 



100 



— 



semicostatus ... 



69 



- depilis 



... 103 



— 



sibericus 



104 



— dissimilis 



... 70 



— 



simplex 



39 



- Duniontiauus ... 



... 65 



— 



Sowerbii 



118 



- ellipticus 



103 



— 



stellaris 



88 



— elougatus 



... 103 



— 



subfimbriatus 



70 



— fallax ... 



... 75 



— 



subpapyracea 



51 



— filatus ... 



... 103 



— 



tabulatus 



67, 165 



— fimbriatus 



... 93 



— 



tripartitus 



79 



— flexuosus 



... 69 



— 



uudulatus 



70 



— Forbesii 



... 83 



— 



Valdaicus 



118 



- gentilis 



... 86 



— 



variabilis 



104 



— gibbosus 



... 106 



— 



villauus 



88 



- granosus 



57, 97 



Peruopecteu ... 



112,117 



- Hardiugi 



... 84 



Petrefacta Derbiensia, Martin 



165 



— heuiispbsericus 



... 45 



Phillips, Geology of Yorkshire, pt. 



ii ... 166 



— hians 



... 73 



Piuua ... 



1 



— iucrassatus 



... 89 



— 



costata 



1 



— intercostatus ... 



... 82 



— 



flabeUiformis 



1 



