824 



CAMBEIAN BRACHIOPODA. 



Clarliella montanensis, described 810 



general geographic and stratigraphic distribution 



tabulated 109 



type specimen figured PI. CIV, fig. 2a 



clarki, see Dearhornia. 



Classification, importance of shellsubstance in 297 



importance of surface ornamentation in 301 



Clayton County, Iowa, locality in 341a 



claytoni, see Acrotreta. 



Clayton Valley, Nevada, locality near 175 



Cleveland, Tennessee, locality near 128 



CltH House, Devils Lake, Wisconsin, locality near 81o 



Clifton quadrangle, Arizona, locality in 9o, 368 



Clinton, Tennessee, locality near 7d 



Cliothyris, cardinal process discussed 306 



Clitambonites, compared witli "Orthis pepirm " 739 



compared with ProtortUs 739 



pedicle tube discussed , 315 



pseudospondylium discussed 307 



Ulrich on spondylium 30S 



Clitambonitidae, compared with Cambrian Orthida3 by Ulxich-. 308 



Ulrich on spondylium 308 



Coal Creek, Tennessee, locality near 374a 



Coal Hill, England, locality at ; . . . 304e 



Coal Pit Bay, Ireland, locality at 317 



Cochise County, Arizona, localities in 14x, 358b 



Codorus Creek, Pennsylvania, locality on 49 



Cog Hill, Tennessee, locaUty near 128a 



Cohoes quadrangle. New York, localities in 27a, 367b 



Coldbrook, New Brunswick, locality at 301c 



Coldbrook (Middle Cambrian), detailed section of, listing included 



species and localities 135 



localities in 13k, 344f 



Cold Creek, Texas, localities on 14b, 14c, 71 



Coleoloides cf. typicalis, association mentioned 328 



Collen, M., species named for 641 



colleni, see Acrothele. 

 collida, see Lingulella. 



Colorado, Cambrian species of, listed 114-119 



localities in 3g, 186, 186a, 187, 335a, 360, 360a-i 



note on stratigraphic position of localities in 135 



coloradoensis, see Billingsdla. 



Colorado River, Arizona, localities on 17c, 



73, 73a, 73b, 74, 74b, 74c, 74d, 76 



Colorado River, Texas, locality on 14r 



Colorado Springs, Colorado, localities near 360, 360d 



Columbia County, New York, localities in 29, 32a, 44b, 338b 



Columbia County, Wisconsin, localities in 86, 3281, 328e 



Columbiana, see Fhilhcdra. 



Comanche County, Oklahoma, localities in 9p-x, 9z, 12] 



Combs Peak, Eureka District, Nevada, locality on 69 



Comley, in generalized section for England, Scotland, and Wales, 



listing species and localities 136 



complexus, see Obolus. 

 compta, see Nisusia. 



Conasauga limestone (Middle Cambrian), localities in 56o, 



56q, 66u, 90b, 90c 

 Conasauga (Coosa) shale (Middle Cambrian), in generalized sec- 

 tion for Tennessee, Georgia, and Alabama, listing spe- 

 cies and localities 147 



localities in 16, 90, 90x, 91, 92x, 94a, 146 



mentioned 505, 521 



coticentrica, see Acrotreta. 



Conception Bay, Newfoundland, localities on 1, la, 2, 2a, 3, 



5p, 5r, 5t, 61, 6n, 6r, 6ii, 6t, 41, 41a, 114, 114a, 114b, 314a, 314e, 314h 



section near, listing species and localities 140-141 



ComUdium, cruralium mentioned 309 



Comhidium nysius, compared •withBillingselta ctporrccta 755 



condnna, see Lingulella. 



Coniston, England, locality at 304n 



Coniston (Bala) limestone (Upper Cambrian), in generalized sec- 

 tion for England, Scotland, and Wales, listing species and 



localities 135 



locaUty in , 3D4n 



Conococheague limestone (Upper Cambrian), locality in 346b 



Conocoryphe elcgans, association mentioned 498 



Conocorypie eisulans zone (Middle Cambrian), in generalized sec- 

 tion for Sweden, Denmark, Finland, and Norway, listing 

 species and Ijcaiities 146 



ConocorypUe exsulans zone — Continued. 



localities in 16i, 334a 



See also Exsulans limestone. 



CoTwcoryphe trilincata, association mentioned 605 



Conrad, T. A., bibliographic reference 15 



contraria, see Orbiculoidea. 



conula, see Acrotreta. 



convcxa, see Acrotreta and Lingulella icinona. 



Coopers Lake quadrangle, Montana, localities in 3j , 5j 



Coosa River Valley, Alabama, localities in 90x, 92x, 94a, 145 



Coosa shale, see Conasauga (Coosa) shale. 

 Copenhagen, see Geneva. 



Copper Ridge, Temiessee, localities on 107, 107a, 107b, 107o, 107u 



coriacea, see Acrothele. 



Coronado quartzite, localities above 9o, 358 



Coronatus zone (Middle Cambrian), in generalized section for 

 Sweden, Denmark, Finland, and Norway, listing species 



and localities 145 



localities in 320i-k 



corrugata, see Finkelnburgia osceola. 



costata, see Acrothele prima. * 



Cottonwood Canyon, Montana, locality near ". 152 



See also Big Cottonwood Canyon. 



Coulouma, France, localities in 342, 342a 



Cound-Moor quarry, England, locality near 304i 



Courtney Bay, New Brunswick, locality on 301y 



Cowan Creek, Alabama, localities on. 93,93o, 93x, 94, 94a, 94o, 94x, 94xx, 95a 



Cow Head, Newfoundland, locality at 314c 



Coxsackie quadrangle. New York, locality in 338 



Craighead, Scotland, locality at 316a 



Craigs Mountain, Alabama, locality near. 90 



Craig-j^-dinas, North Wales, locality at 305 



Crane, Agnes, bibUographic reference 15 



Crania Iselia, compared with Philhedra columMana 724 



" Crania un^uiculata," ty^e of Siphonotreta 625 



Craniacea, classification of '321, 325 



distribution in Cambrian strata 316 



genera and species referred to, described 724 



Craniidse, canal system mentioned 312 



classification of .' 321, 326 



distribution in Cambrian strata 316 



genera and species referred to, described 724 



general stratigrapliic distribution and number of Cambrian 



genera and species of 112 



number of Cambrian genera and species of 112 



number of genera and species in monograph 113 



crassa, see Obolella. 

 crassa elongata, see Obolella. 

 crassus, see Obolus (Schmidtia). 

 crenistria, see Micromitra (Paterina). 



Crepicephalus texanus, association mentioned 692 



Cressage, England, locality at ■ 304i 



Crested Butte, Colorado, localities near 336a, 360b, 360c 



Criccieth, North Wales, locality at 318a 



Cricket Range, Utah, locality in 33r 



Cricket Spring, Cricket Range, Utah, locality near 33r 



Crow Creek, Utah, locaUty on 33ii 



Crowfoot Ridge, Gallatin quadrangle, Wj'oming, locality on. 302b, 302e 



Crura, defined 293 



Cruralium, defined 293 



discussed 309 



Cruziana, association mentioned 359 



Ctenocephalus matthewi, association mentioned 498 



Cumberland County, Peimsylvajiia, locality ui 49f 



Cumings, E. R., bibliographic reference 15 



cuneola, see Lingulella. 



Curramulka, Yorke Peninsula, Soutli Australia, locality at 315 



Curtice, Cooper, genus named for 369 



Curticia, described 369 



classification of 321, 322 



compared with Dicellomus 360 



Micromitra 318 



Obolus 318, 369, 370 



Rustella 370 



delthyrium discussed 318 



evolution discussed 318 



evolution of 317 



general geographic arid stratigraphic distribution of 

 the species referred to : 99 



