CAMBRIAN GEOLOGY AND PALEONTOLOGY 



II 



No. 5.— MIDDLE CAMBRIAN ANNELIDS 



By CHARLES D. WM^COTT 



(With Six Plates) 



CONTENTS 



Introduction 



Cambrian annelids 



Classification 



Relations to living annelids 



Descriptions 



Class Chastognatha 



Family Amiskwidae, new family 



Genus Amiskwia, new genus 



Ainiskwia sagittiformis, new species 



Class Chaetopoda 



Sub-Class Polychaeta 



Order Miskoa, new order 



Family Miskoidae new family 



Genus Miskoia, new genus 



Miskoia preciosa, new species 



Family Aysheaidse, new family 



Genus Aysheaia, new genus 



Aysheaia pedimculata, new species 



Family Canadidae, new family 



Genus Canadia, new genus 



Canadia spinosa, new species , 



Canadia setigera, new species 



Canadia sparsa, new species 



Canadia dubia, new species 



Canadia irregularis, new species 



Genus Selkirkia, new genus 



Selkirkia major (Walcott) 



Selkirkia fragilis, new species 



Selkirkia gracilis, new species 



Family Wiwaxidce, new family 



Genus IViwaxia. new genus 



JViwaxia corrugata (Matthew) 



Genus Pollingeria, new genus 



Pollingeria grandis, new species 



Genus Worthenella, new genus 



Worthenella cambria, new species 



Smithsonian Miscellaneous Collections, Vol. 57, No. 5 



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