INDEX 485 



Camasia — Continued. page 



spongiosa — Continued. 



compared with Blue-green algal cells 103 



" Layer deposit " 1 18 



in Newland limestone 99 



mineral composition 102 



resemblance to Blue-green algae loi, 115 



Cambria, see Cyrtoccras. 



Cambrian, basal unconformity 83, 288 



Beaver Creek section 270 



Big Snowy Mountains, Montana 273 



Butte district, Rothpletz interpretation 281 



fauna! provinces of, in Asia 69 



Lower, Middle, and Upper, Asiatic, discussed 60 



relation to Ordovician 41 



faunas, Chinese compared with American and European 45 



correlation of sections by Willis and Blackwelder, China... . 11 



faunas of China, publication 160 



correlated, Stephen formation 66 



discussed 56 



historical review 5 



memoir discussed 2 



table, stratigraphic and geographic position 44-50 



distribution 6g 



faunas of Eastern Asia, publication 160 



Flathead sandstone, above Belt series 99 



and Marsh shale, unconformity, fig. 13 286 



and Helena limestone, unconformity, fig. 12 286 



Flathead and Belt terrane, contact described 285 



formations. Big Snowy Mountains, Montana 274 



identified, Liau-tung, Blackwelder 4 



in Asia, Reed cited 69 



studied by Weed 267 



fossils, described by Dames 3 



Grand Canyon section, fig. 11 283 



sea, transgression over eastern and southeastern Asia 5 



sections 54 



and faunas. North America and eastern Asia, compared.... 3 



Little Belt Mountains 273 



of Rothpletz and of Weed, compared 281 



species, stratigraphic and geographic distribution 44 



summit of, at Mount Helena 269 



time, period fixed by Man-t'o shale data 5 



Trilobites, publications on 160, 303 



Cambrian and Algonkian, unconformity (Ac), pis. 41-43 284-289 



unconformity illustrated, fig. 1 1 283 



Helena 265 



