INDEX 441 



PAGE 



Distribution, stratigraphic, four subclasses of this paper 155 



divi, see Agraulos and Inouyia. 



Dolichometopus Angelin {■= Amphoton Lorenz), present and former ge- 

 neric reference 70 



deois Walcott (= Amphoton steinmanni Lorenz). present and for- 

 mer generic reference 70 



{■=iBathyuriscus asiatictts Lorenz), present and former ge- 

 neric reference 70 



Dolomite, siliceo-argillaceous, in St. Lawrence formation 355 



dolon, see Pagodia. 



Donald Station, British Columbia, Canada. Upper Cambrian locality 34^6 



near 368 



doris, see Eoorthis and Orthis (Plcctortliis). 



Dorypygclla Walcott (=: Teinistion Monke), former and present generic 



reference 71 



alastor Walcott {=Blackzveldcria alastor (Walcott)), former and 



present generic reference 71 



alcon Walcott {^ T einistion alcon (Walcott)), former and present 



generic reference 71 



richthofeni zone of Manchuria, Orthotheca glabra abundant in.... 76 

 Dorypygeila typicalis Walcott {=iTeinistion 'typicalis (Walcott)), for- 

 mer and present generic reference 71 



douvillci, see Agnostus. 



Dresbach formation, in provisional classification 354 



Dresbach sandstone, listed with Upper Cambrian of Minnesota 353 



dryas, see Agraulos. 



dry ope, see Conokcphalina and Ptychoparia. 



dubia, see Canadia. 



Dunderberg mine, Nevada, Upper Cambrian locality 66 362 



Dunderberg shale, Upper Cambrian locality 62', Adams Hill, Nevada.. 361, 381 



Upper Cambrian locality 66, Eureka district, Nevada 362 



Dutchess County, New York, " Saratogan " fauna as represented in 255 



East Branch Moose River, changed to Moose River 331 



eatoni, see Aglaspis, Dikelocephalus, and Platycolpus. 



Eau Claire formation, fauna listed and discussed 358 



in provisional classification 354 



Eccyliomphalus n. sp., listed from Franconia formation 357 



Eccyliopterus sp., Cambrian f acies questioned 255 



listed from Potsdam-Hoyt fauna 254 



Echinoderm, theoretical ancestor of, mentioned 148 



Echinodermata, Lankester cited on 43, 44 



section on, by F. A. Bather 148 



spiral alimentary canal of 50 



Eldon formation, comparative stratigraphic sections 343 



summary, stratigraphic section 342 



Eldonia Walcott, new genus described 45 



genotype, Eldonia ludzvigi 45 



stratigraphic range 46 



geographic distribution 46 



