SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



PAGE 

 Cephalacantlius broggeri Lapworth, in synonymy 279 



callavci Lapworth, in synonymy 282 



kjcnilii Lapworth, in synonymy 289 



Cephalon, development of 236 



segmentation of 237-238 



Ceraurus, specimens of found lying on their backs 241 



cingulata, see Kutorgina. 



Clarke, John ]\I., acknowledgments 235 



Clarke, John M., and Ruedemann, R., bibliographic reference 372 



clayioni, see Olenellus. 



Cleveland, Tennessee, fossils from 310, 340 



Cobbold, E. S., bibliographic reference 372 



Cole, G. A. J., bibliographic reference 372 



Comley quarry, fossils from 282, 283 



Comley sandstone, fossils from 282, 283 



communis, see Hyolithcs. 



Conception Bay, fossils from 280 



crosbyi, see Callavia. 



Crusiana, the trail of a mud burrowing trilobite 242 



Curtice, Cooper, acknowledgments 235 



Dale, T. Nelson, bibliographic references 372, 373 



on the Greenwich formation 268 



Dawson, Geo. M., mentioned 317 



Deep Spring Valley, fossils from 300, 323 



Dickhaut, Henry, acknowledgments 235 



Discinella, mentioned 279 



dubia, see Siphonotreta. 



Eakles Mill, fossils from 340 



Ebeneseria Marcou, in synonymy 267 



asaphoides Marcou, in synonymy 270 



Edson, George, bibliographic reference 373 



mentioned 254 



Elliptocephala Emmons 267 



Beecher, in synonymy 268 



Cole, in synonymy 267, 268 



Emmons, in synonymy 267 



Matthew, in synonymy 268 



anterior glabellar lobe in 243 



compared with Mesonacis 269 



Nevadia 256, 257 



IVanncria 298 



delimitation of genus 247 



development of, shown in diagram 249 



development of thorax in 244 



eye lobes in 239 



genal and intergcnal spines in 237 



geographic distribution of 253 



mentioned 236, 245, 246, 250, 288, 309 



