CAMBRIAN CORDILLERAN SECTIONS. 221 



INDEX. 



Page 



Acrothele artemis Walcott 198 



colleni, new species 203, 213, 214 



panderi, new species 203, 214 



spurri Walcott 184, 189 



subsidua (White) 180, 181, 183, 195, 197 



subsidua hera Walcott 184 



subsidua var 198 



cf. turneri Walcott ig6 



A crothyra minor Walcott 19S 



Acrotreta attenuata Meek 179, 180, 181 



bellatula Walcott 179 



claytoni Walcott 189 



deprcssa (Walcott) 210 



idahocnsis Walcott 177 



idahocnsis alta Walcott 193 



idalwcnsis sulcata Walcott 198 



viarjumensis Walcott 179 



ophirensis Walcott 178, 180, 182 



ophirensis descendens Walcott 178 



primaeva Walcott 184 



py.ridiaila White 180, 198 



cf. sagittalis Salter 179 



sagittalis taconica (Walcott) 213, 215 



sp. undt 192, 198 



acuminata^ see IJnguklla (Lingulepis). 



acntangula, see Anomalocaris. 



agues, see Olenopsis. 



Agnostus bidens Meek 181 



cf. iiiontis Matthew 209, 211 



sp. undt 176, 178, 180, 192, 193, 194, 197, 199, 204, 205, 208, 210 



Agraulos 175, 177, 189, 194, 195, 210, 212, 213, 214, 215 



alberta, see Nisusia. 



Alberta, boundary of Cambrian land area in 169 



Albertella bosworthi Walcott 214 



helena Walcott 203, 214 



sp. undt 213, 214 



Albertella fauna, in Montana and British Columbia, stratigraphic position 

 of. discussed '. 203 



ainii, see Nisusia {Jamesella). 



annulatus, see Hyolithellus. 



Anomalocaris ?? acutaiigula Walcott 211 



canadensis Whiteaves 211 



f zuhiteavesi Walcott 211 



Anomocarc 176, 178, 179, 192, 193 



Archceocyaihus 187, 189 



argcntea, see Isoxys. 



arguta. see Lingulella. 



artemis, see Acrothele. 



