472 INDEX 



PAGE 



Orthoceras sp. undt., listed in stratigraphic section 336 



Orthotheca communis Billings, represented in China by Orthothcca glabra 



Walcott 7(> 



corrugata Matthew, genotype of IViwa.via 123 



synonymic reference 123 



glabra Walcott, new species described 75 



figured, pl.*i4, figs. 5, 5a 102 



abundant in Dorypyge richthofeni zone of Manchuria 76 



associated with Hyolithes cybcle Walcott 76 



compared with other Chinese forms 76 



listed, Cambrian faunas of China 7i 



representative of American Orthothcca cciminmis Billings.. 76 



suggests Hyolithellus 76 



major Walcott (^= Selkirkia major), synonymic reference 120 



genotype of Selkirkia 120 



osccola, see Dikelocephalus, Finkclnburgia, LingnlcUa mosia, Osccolia, and 

 Spirodcntaliuiii. 



Osceola, Wisconsin, Upper Cambrian localities 78 and 78b 361 



Osccolia Walcott, new genus described 385 



compared with Calvinella 349 



Dikelocephalus, Saukia, and Calvinella 385 



Saukia 375 



genotype, Dikelocephalus osccola Hall 385 



locality of, discussed 362 



observations on the genus 348 



referred to Dikelocephalinas 348 



represented by a single species 385 



Osceola ( Hall ) , described 386 



figured, pi. 68, figs. 4-10 408 



associated parts of 385 



association of 362 



with Illcenurus quadraius Hall 386 



formation and locality 386 



in synonymy 386 



listed from locality 66 362 



from locality 70a 359 



from localities 78 and 78b 361 



from Jordan formation 355 



with St. Lawrence fauna 356 



Ostracoda, descent of 160-161 



foreshadowed by Burgess shale fauna 165 



oldest known representative of 157 



traces of 148 



mentioned 155 



Ostracods in Middle and Upper Cambrian 157 



Ottertail formation, named by Allan 230 



fossils from : Lingulella, Agnostus, and Ptychoparia 230 



Ottertail limestone, Goodsir horizon, British Columbia 232, 233 



Otto Creek, British Columbia, Goodsir horizon 232, 233 



generic name derived from 128 



