62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



PAGE 

 Genus Dokimocephalus Walcott 83 



Dokimocephalus gregori, new species, Upper Cambrian 84 



Dokimocephalus pernasiitus (Walcott), Upper Cambrian 84 



Genus Dimdcrbergia Walcott 84 



Dunderbergia nitida (Hall and Whitfield), Upper Cambrian 85 



Genus Elkia Walcott 85 



Elkia nasuta (Walcott), Upper Cambrian 85 



Genus Elrathia Walcott 86 



Elrathia kingii (Meek), Middle Cambrian (Marjum, Wheeler).. 87 

 Genus Elvinia Walcott 88 



Elvinia roemeri (Shumard), Upper Cambrian (Cap Mountain).. 88 

 Genus Eiirekia Walcott 89 



Eurekia dissimilis (Walcott) , Upper Cambrian 90 



Eurckia granulosa Walcott, Upper Cambrian 90 



Genus Hardyia Walcott 90 



Hardyia metion Walcott, Ozarkian (Mons) 91 



Genus Holteria Walcott 91 



Holteria problcmatica (Walcott) , Upper Cambrian 93 



Genus Housia Walcott 93 



Housia canadensis (Walcott), Upper Cambrian (Goodsir) 94 



Housia varro (Walcott), Ozarkian (Orr) 95 



Genus Idahoia Walcott 95 



Idahoia maladensis, new species, Upper Cambrian (Ovid) 96 



Idahoia serapio Walcott, Upper Cambrian (Ovid) 96 



Genus Iddingsia Walcott 97 



Iddingsia robusta (Walcott), Upper Cambrian 97 



Iddingsia similis (Walcott) , Upper Cambrian 97 



Genus Irvingella Ulrich and Resser 97 



Irvingella major Ulrich and Resser MSS., Upper Cambrian 



( Franconia) 98 



Genus Isoteloides (Raymond) 99 



Isotcloides ? lautus, new species, Upper Ozarkian (Mons) 99 



Isoteloides f maladensis, new species, Ozark'an ? 99 



Isoteloides occidentalis, new species, Ozarkian ? (Mons) 99 



Isoteloides ? sp. undt., Ozarkian (Mons) 100 



Genus Kainella, new genus 100 



Kainella billingsi (Walcott) 102 



Genus Kingstonia Walcott, Ozarkian 103 



Kingstonia apion Walcott, Upper Cambrian (Maryville) 103 



Genus Leiostegium Raymond 104 



Leiostegium manitouensis, new species, Ozarkian (Chushina) . . . . 104 

 Genus Maladia Walcott 104 



Maladia americana Walcott, Upper Cambrian (Ovid) 105 



Genus Modocia Walcott 105 



Modocia oweni (Meek and Hayden), Upper Cambrian (Dead- 

 wood ) 106 



Genus Moosia Walcott 106 



Moosia grandis Walcott, Upper Cambrian (Goodsir) 107 



Genus Moxomia Walcott 107 



Moxomia angulata (Hall and Whitfield), Ozarkian (Qiushina) . . 107 



