CAMBRIAN GEOLOGY AND PALEONTOLOGY
II
No. 5.—MIDDLE CAMBRIAN ANNELIDS
By CHARLES D. WALCOTT
(With Six Plates)
CONTENTS
| PAGE | |||
| Introduction | 110 | ||
| Cambrian annelids | 111 | ||
| Classification | 111 | ||
| Relations to living annelids | 111 | ||
| Descriptions | |||
| Class Chætognatha | 112 | ||
| Family Amiskwidæ, new family | 112 | ||
| Genus Amiskwia, new genus | 112 | ||
| Amiskwia sagittiformis, new species | 112 | ||
| Class Chætopoda | 113 | ||
| Sub-Class Polychæta | 113 | ||
| Order Miskoa, new order | 113 | ||
| Family Miskoidæ new family | 113 | ||
| Genus Miskoia, new genus | 114 | ||
| Miskoia preciosa, new species | 114 | ||
| Family Aysheaidæ, new family | 116 | ||
| Genus Aysheaia, new genus | 116 | ||
| Aysheaia pedunculata, new species | 117 | ||
| Family Canadidæ, new family | 117 | ||
| Genus Canadia, new genus | 118 | ||
| Canadia spinosa, new species | 118 | ||
| Canadia setigera, new species | 119 | ||
| Canadia sparsa, new species | 119 | ||
| Canadia dubia, new species | 119 | ||
| Canadia irregularis, new species | 120 | ||
| Genus Selkirkia, new genus | 120 | ||
| Selkirkia major (Walcott) | 120 | ||
| Selkirkia fragilis, new species | 122 | ||
| Selkirkia gracilis, new species | 122 | ||
| Family Wiwaxidæ, new family | 123 | ||
| Genus Wiwaxia, new genus | 123 | ||
| Wiwaxia corrugata (Matthew) | 123 | ||
| Genus Pollingeria, new genus | 124 | ||
| Pollingeria grandis, new species | 125 | ||
| Genus Worthenella, new genus | 125 | ||
| Worthenella cambria, new species | 126 | ||
Smithsonian Miscellaneous Collections, Vol. 57, No. 5
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