444 INDEX 



Eurypterida — Continued. page 



relation to Limulava 164 



relation to Sidneyia 206 



representing Merostoniata 163 



Sidneyia, compared with other 23 



Eiirypterus, Beltina zone fossils not closely related to 13 



compared with Amiella 27 



Amiella ornata 28 



Sidneyia inexpectans 206 



and Pterygotus, related to Beltina 21 



and Trilobita, Sidneyia a transition form between 27 



Evolution, theoretical, of Cambrian Crustacea from Branchiopoda, table.. 164 



Exopodite, protopodite bearing I59 



swimming, of Branchiopoda Marrella, Opabinia, and Leanchoilia. . 160 



Exoskeleton, described 157 



Extinguisher, changed to Billings Butte 331 



Eyes, Branchiopoda and Malacostraca 159 



Fairview formation, comparative stratigraphic sections 343 



summary, stratigraphic section 342 



and McNaughton formation, compared 343 



fallax, see Saukia. 



Female of Opabinia regalis, described 169 



ferruginea, see Lingulella. 



Field, British Columbia, discovery of 1909 18 



mountain above Burgess Pass, British Columbia 188 



fieldensis, see Protypus and Waptia. 



Fieldia Walcott, new genus discussed 188 



classification of I54 



lanceolata Walcott, new species described 188 



figured, pi. 32, fig. 8 224 



stratigraphic position and association 153 



finalis, see Apatokephalus. 



Finkelnburg, W. A., acknowledgments to 347 



finkelnbnrgi, see Finkelnburgia. 



Finkelnburgia finkelnbnrgi (Walcott), listed from Franconia formation.. 357 



listed from Jordan formation 355 



from locality 78 361 



with St. Lawrence fauna 356 



Osceola (Walcott), listed from Franconia formation 357 



listed from localities 78 and 78b 361 



with St. Lawrence fauna 356 



osceola corrtigata (Walcott), listed from locality 78 361 



listed with St. Lawrence fauna 356 



flabellifer, see Dikeloccphalus. 



Flabellum of Naraoia compacta, evidence of 176 



iiava, see Anomocare. 



Ford, cited on Mathcrella 263 



forficida, see Ceratopyge. 



Formation names, new ., 334 



