INDEX 489 



Chuangia — Continued. page 



nitida Walcott (z^ShcDititiigia bucliruckeri), generic references... 16 



listed Wang-tschuang 11 



Sin-t"ai district 67 



stratigraphic and geographic position 48 



Chuar formation ( C) , fig. 11 283 



Chuar terrane, Grand Canyon, Arizona 140 



cilix, see Blackwelderia and Olenoidcs. 



cingulata, see Kutorgina. 



circe, see Matherella and Straparollina. 



Cladophora glomcrata, algal deposit of 88 



Clark, Austin H., acknowledgn>ents 80 



Clarke, John M., acknowledgments 79, 142 



Classification, genera and species, summary table 44 



clavatus, see Corynexochus. 



Clear Creek. Burnet County, Texas, Crcpicephalus tcxaiuis from 209 



cleora, see Tsiiiaiiia. 



Cleveland, Bradley County, Tennessee, Upper Cambrian locality 128 near 197 



Climate, Algonkian, suggested 83 



clotho, see Scenella. 



clurius, see Hclcionella and Stenotheca. 



clytia, see Pagetia, Pelagiella and Platyceras. 



Coal measures of St. Etienne, Palaeozoic bacteria in 94 



Coastal deposits, Algonkian, none yet known 8^ 



Coconino sandstone (C), Grand Canyon section, pi. 43 288 



Collen, M., acknowledgments 79, 186 



report on Newland algal forms 99, 100 



specimens of Grcysoitia collected by icg 



CoUenia, new genus, described no 



figured, pi. 13 136 



an algal deposit 98 



Cambrian algal forms allied to 79 



compared with Gallatinia pcrtcxa 1 17 



" Lake Balls " 103 



" Water biscuit " 100 



deposited by algae loi 



habitat loi 



laminate structure 100 



observations 1 1 1 



resemblance to Cryptozoon Hall iii 



species listed in 



suggested by Peale's so-called " fossil turtles " 112 



CO III pacta, new species, described 112 



figured, pi. 15, fig. 7 140 



classified as semisphserical 104 



compared with Archceosoan acadiciisc 114 



CoUenia occidentalc in 



stratigraphic range no 



? frcquens (Walcott), described 113 



figured, pi. ID, fig. 3 130 



