" 564 INDEX 



PAGE 



Finkelnburgia finkelnburgia Walcott, compared 514 



noblei, new species, Upper Cambrian, described - 514 



figured, pi. 1 15, figs. 6-8a. . . 543 



oseola Walcott, compared 514 



Flathead ? sandstone 18 



Fossil Mountain 459 



Front Range 463 



Gasconade formation 468 



fauna 468 



Gatesburg formation 469 



fauna 469 



Genus Acrothyra Matthew 498 



Acrotreta Kutorga 496, 525 



Billingsella Hall and Clarke 501, 525 



Ellesmeroceras Foerste 527 



Eoorthis Walcott 505, 526 



Finkelnburgia Walcott 514 



Huenella Walcott 520, 526 



Lingulella Salter 490, 524 



Lingulepis Hall 488 



Micrometra Meek 481 



Nisusia Walcott 498 



Obolus Eichwald 482 



Ozomia, new genus S3 1 



Protorthis Hall and Clarke 503 



Syntrophia Hall and Clarke 515 



Wimanella 'Walcott 500 



Geological periods : see Cambrian, Canadian, Ordovician, Ozarkian. 



Ghost River formation 463 



Glacier Lake district 459, 460 



Glenogle Creek 463 



fauna 464 



formation (Ordovician) 463 



fauna 463 



Gogia Walcott, new genus 68 



prolifica Walcott, described 68 



figured, pi. 8, figs. 1, la, b 104 



Goodsir formation fauna 471 



Goodwin formation (Ozarkian, Lower) 466 



fauna 467, 475 



Gordon formation 17 



shale fauna 22 



in Montana 23 



name proposed 7 



Green Algae, genera and species listed 222 



Gymnogongrus leptophyllus J. Agardh, compared 223 



Haguia sphaerica, Upper Cambrian sponge : 264 



H alichondrina Vosmaer 269 



