Cabeça de Vaca on trade in shells 194 Cabrillo, João, visits Island of Santa Rosa 260 Calendars, Pictographic symbols of the Sioux 279 , Probable use of shell disks as 268, 273, 278 used by ancient Mexicans 279 modern tribes 279 Carr, Lucien, describes shell gorget 295 Cassis shells used as vessels 191, 194, 196 Catlin, George, describes shell adze 205 Celts, Examples of 203 , Manufacture of 203 of shell 203, 205 Clam shells used as implements 190, 205, 207 utensils 190 in manufacture of ornaments 263 wampum 190, 226, 238, 257 Clark, J. S., Photographs made by 252 Clavigero, F. X., on use of shell ornaments 256 vessels in Mexico 193 Cleveland, F., describes shell vessels 197 Columellæ, Manner of extracting, from shell 214 used in manufacture of heads 219, 223 pins 213, 218 Conant, A. J., describes shell gorgets 300 , mentions shell gorgets 287 Cross design associated with others 270 combined with spider design 288 in Aztec paintings 285 engraved on shell gorgets 268 , Evolution or derivation of the 270 , Examples of the, combined with birds 282, 283 , Examples of the, from mounds 271, 273 , Introduction of the Christian 269 , Occurrence of the, in ancient Mexican art 270 Yucatan 270 , Origin of the, among mound builders 269 , Prehistoric use of the, in America 268, 270 , Symbolic character of the 269 Croswell, C., describes shell gorgets 286 Curtis, Dr., Shell gorgets collected by 283 Cyprea shells used as beads 219 ornaments 263 Dall, W. H., use of pins 217 , Shells identified by 190 Davis, W. H. H., mentions shell pendants 256 Dentalium shells used for money 191, 220, 227, 239 ornament 191, 218, 220, 227 in bushing 218, 227 Disks, Scalloped, probably time symbols 273 , Relation of, to human remains 276 shell, from mounds 275, 278 , Shell gorgets in the shape of 268, 273, 279 stone 277 with engravings of knotted serpents 278 , Table of 280 , The sun suggested by 273 , Type example of 273 ; use of sun symbols of similar shape 273 Drake, Daniel, describes shell vessel 197 Dunning, E. O., Shell ornaments collected by 272 pins collected by 215 Ely mound in Virginia 295 Engraved gorgets. (_See_ Gorgets.)