TABLE OF CONTENTS. 



III. CARBONIFEEOUS AGE. Pekmian Period. 



MOLLUSCA 



Class Lamellibranchiata . 

 Family PectiniDjE 

 Subfamily Pectinin^ 

 Subfamily Aviculopectinin^ 

 Genus Avicdlopecten 



Aviculopecten ? 



McCoyi 

 Family Pteriid^e 



Subfamily Pteriniin^ . 

 Geuus Myalina . 



Myalina aviculoides 

 permiana 

 Subfamily PTERiNiiNiE . 

 Genus Eumicrotis 



Eumicrotis Ilawni 



var. ovata 

 Subfamily Melinin.e 



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48 

 48 

 48 

 48 

 50 

 50 

 .50 

 50 

 51 

 51 

 51 

 51 

 51 

 53 

 53 

 54 

 55 

 56 



Genus Bakevellia 



Bakevellia parva 

 Family Trigoniidv* . 

 Geuus ScHizoDus . 



Schizodus ovatus . 

 Family Nuculid^ 



Subfamily NuculaniNjE . 

 Genus Yoldia 



Yoldia ? subscitula 

 Subfamily Malletin^ . 

 Family Crassatellid^ 

 Genus Pleurophortjs 



Pleurophorus 1 subcuneatus 

 ? Calhouni 

 Class Cephalopoda 

 Order Tetrabranchiata 

 Family Nautilid^ 

 Genus Nautilus . 



Nautilus eccentricus 



IV. REPTILIAN AGE. Jurassic Period. 



Radiata 



66 



Class EcniNODERMATA .... 



66 



Order CRiNoiDiE .... 



66 



Family PentacrinidjE . 



66 



Geuus Pentacrinites . 



66 



Pentacrinitcs asteriscus 



61 



MOLLUSCA 



68 



Class Brachiopoda . . • . 



68 



Family Lingulid^ .... 



68 



Genus Lingula .... 



68 



Lingula brevirostris 



69 



Family Rhynchonellid.^ . 



70 



Geuus RlIYNCHONELLA . 



70 



Rliynebojiella ? . 



71 



Class Lamellibranchiata . 



72 



Family OsTREiDiE .... 



72 



Geuus OSTREA .... 



72 



Ostrea Engelmanni 



73 



Genus GnYPHiEA .... 



74 



Grypliaja calceola var. nebrascensis 



74 



Family Pectinidte .... 



76 



Subfamily Pectinin^ 



70 



Genus Camptonectes . 



76 



Camptonectes bellistriatus . 



77 



? e.\tenuatus . 



78 



Family Pteriid^ .... 



79 



Subfamily Pteriin.^ 



79 



Genus Pteria .... 



79 



Subgenus Oxytoma 



Pteria Munsteri 

 Genus Eumicrotis 



Eumicrotis curta 

 Family TRiGONiiDiE . 

 Genus Trigonia 



Trigonia Conradi . 

 Family Mytilid^e 

 Genus Volsella 



Volsella pcrtenuis . 



formosa . 



Family Arcidje . 



Subfamily Arcing . 



Subfamily MACRODONTiN.a; 



Genus Gkammatodon . 



Grammatodon inoruatus 

 Subfamily AxiNiNiE 

 Family Unionid.^ 

 Genus Unto . 



Unio nucalis 

 Family CrassatellidjE 

 Genus Astarte 



Astarte fragilis 

 Astarte inornata . 

 Family TANCREDiiDiE 

 Genus Tancredia . 



Tancredia Warrenana 

 ? tcquilateralis 

 Family CARDiiD.a; 



