CAMBRIAN CORDII^IvERAN SECTIONS. 223 



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Cambrian land area, extent and relations i68, 169 



Cambrian (Lower) of Montana and British Columbia, compared 203 



Cambrian sections of China and Cordilleran area, compared 172 



canadensis, see Anornalocaris and OlcncUus. 



Carboniferous rocks, section of on Dearborn River 200 



carinatiis, see Hyolithes. 



Castle Mountain, Alberta, fossils in 208, 212, 214 



views of pi. 20 



Cathedral formation, Castle Mountain, view showing pi. 20, fig. 2 



Cathedral formation, Mount Bosworth 171, 2ia 



Cathedral formation. Mount Stephen, view showing pi. 21 



Cathedral formation near Lake Louise, view showing pi. 22 



China, comparison of Cordilleran sections with sections in 172 



cingidata, see Kutorgina. 



claytoni, see Acroireta and Olencllus. 



colleni, setAcrothcle. 



coloradoensis, see Billingsella and Eoorthis. 



Columbiana, see Philhedra. 



Conocephalus cf. perseus Hall, Matthew 211 



co7itracta, see VanuxemcUa. 



Cordillera, see Ptychoparia. 



Cordilleran land area in Cambrian time 168, 169' 



Cordilleran sections compared with those in China 172 



corrugata, see Orthotheca. 



Corynexochus romingeri Matthew 211 



crcnistria, see Micromitra (Paterina). 



Crepicephalus augusta Walcott 184 



liliana Walcott 184 



texanus (Shumard) 177, 178 



sp. undt 175, 176, 204, 205, 213 



Criiziana 184, 186, 187, 211, 216 



Cyrtolites 193 



dawsoni, see Dorypyge (Kootenia) . 



Dearborn River section, Montana, correlation 171 



described 200-203 



resume of 202-203 



Deep Spring Valley, California, view of quartzite in pi. 18 



dcpressa, see Acrotreta. 



desiderata, see Lingulella. 



Dicellocephalus 175, 191 



Dicellomus prolificus Walcott 179 



discoideus, see Obolus. 



Dome Canyon, House Range, view of pi. 16 



Dome formation, House Range 171, 182, pis. 16 and 17 



Dorypyge quadriceps (Hall and Whitfield) 196 



(Kootenia) dawsoni (Walcott) , 211 



sp. undt 181, 183, 195, 197, 199 



dubia, see Lingulella and Siphonotreta. 



Dunderberg shale, new formation name proposed 184 



Eldon formation, Castle Mountain, views showing pi. 20, figs, i and 2 



