INDEX. 



825 



CuTticta — Continued. 



general stratigrapliic distribution and number of Cam- 

 brian species and varieties of 110 



mentioned 369 



number of species of, in different types of sediment. 160 



elegantula described 369 



general geographic and stratigraphic distribution 



tabulated 99 



type specimen figured PI. I, fig. 2 



CurticlidEe, classification of 321, 322 



distribution in Cambrian strata 316 



genera and species referred to, described 369-370 



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 



species referred to, described 369-370 



CUTvata, see Acrotreta. 



Custer, South Dakota, locality near 167 



cyane, see Obolus. 



Cyrtia, reference to, of "Acrotreta 9 costata " 674 



Cyrtoceras cambna mentioned 468 



Czerhowitz, Bohemia, locality at 303 j 



Dakota, Minnesota, locality near 84s 



Dalarue, Sweden, locahties in '. 8y, 9e, 310ii, 3901 



Dale, T. N., mentioned ' 409 



Dall, "W. H., bibhographic references 15 



Dalman, J. A., bibhographic reference 15 



Dalmanella, classification of, by Ulrich 308 



compared vnth FrotorthUi 739 



muscle scars of, discussed by Ulrich 30S 



no Cambrian representatives 320 



reference to, of "Lepta^na melita" discussed 777 



muUisecta, shell section figured text fig. 9, 299 



parva, shell section figured text fig. 10, 299 



suhsequata, compared with Orthis tricenaria by Ulrich 308 



muscle scars of, discussed by Uhich 308 



shell section figured text fig. 2, 299 



suhsequata group, compared with average Cambrian articu- 

 late by Ulrich 308 



damesi, see Lingulella. 



Danaher Creek, Ovando quadrangle, Montana, locality near 4w 



Dane County, Wisconsin, localities in 85x, S85x, 85z, 328p 



Danish Flat, Bear Lake County, Idaho, localities near 55c, 163 



Danzig, West Prussia, locality near 388d 



Darton, N. H., species named for 455 



dartoni, see Obolus ( Westonia). 

 daunus, see Eoorihis. 



Davidson, T., bibliographic references 15, 16 



species named for 489 



^'Davidsonella," discussed 565 



^'linguloides," discussed 565 



"squama,''^ discussed \... 567 



davidsoni, see Lingulella. 



Davis, J. E., bibliographic reference 16 



species named for 491 



davisi, see Lingulella. 



Dawson, J. W., bibliographic references 16 



Dawson, WilUam E.. acknowledgments 12 



Deadwood, South Dakota, localities near 88a, 164, 165, 355f 



Deadwood formation, note on localities in 144 



Deadwood formation (Middle Cambrian), localities in. . . 164, 302e, 355b 



Deadwood formation (Upper Cambrian), localities in 302p, 302u 



Dearbornia, described 614 



classification of 321, 324 



compared with Discinopsis 614 



Obolus 614 



Schizambon 614 



Siphonotreta 614 



Trematobolus 313, 614 



evolution of 317 



general geographic and stratigraphic distribution of 



the species referred to 104 



general stratigraphic distribution and number of Cam- 

 brian species and varieties of Ill 



number of species of, in different types of sediment ... 160 



shell substance 297 



stratigraphic position mentioned 319 



type species Dearbornia clarki 614 



vasdular markings discussed 311 



Dearbornia clarki, described 614 



general geographic and stratigraphic distribution tabu- 

 lated 104 



type of Dearbornia 614 



type specimen figured PI. LX XXII, fig. 7 



Dearborn River (North Fork), Montana, localities on 9k, 9m 



Dearborn River section, Montana, localities con'elated with 3j, 



4q, 4q', 4v, 4w, 5j, 8], 9k 

 decipienSfSGe Acrothele and Obolus mcconnelU. 



Dedham quadrangle, Massachusetts, locality in 5 



Deep Creek, Wyoming, locality on 4j 



Deep Spring Valley, California, localities in 176, 178a 



definita, see Acrotreta. 



Definitions : 292-296 



Delano, see Mount Delano. 



Delgadella, described 560 



cardinal area discussed 303 



classification of 321, 323 



compared mth Lingula 560 



evolution discussed 319 



evolution of 317 



general geographic and stratigraphic distribution of 



the species referred to 103 



general stratigraphic distribution and number of Cam- 

 brian species and varieties of 110 



number of species of, in the different types of sedi- 

 ment 160 



type species " Lingulepis lusitanica" 560 



lusitanica, described 560 



cardinal area discussed 304 



general geographic and stratigraphic distribution tabu- 

 lated 103 



type specimen figured PI. XXIX, fig. 5 



Delgado, J. F. Nery, acknowledgments 12 



bibliographic reference 16 



genus named for 560 



species named for 491 



delgadoi, see Lingulella. 



Deltidium, compared with pseudodeltidium 306 



defined 293 



development of 306 



discussed 305-306 



holoperipheral growth of 306 



Delthyrium, defined 293 



discussed 305-306 



Denmark, Cambrian species of, listed 120-121 



generalized section of Cambrian and Ordovician in, hsting 



included and correlated species and locahties 144-146 



localities in 16h-l, 334, 334a-h 



See also Bornholm. 

 Dennis, see Mount Dennis. 



Dental plates, defined 293 



discussed 310-311 



relation of, to spondylium discussed by Uhxh 308 



Dental sockets, defined 293 



depressA, see Acrotreta. 

 deseenden^, see Acrotreta opMrensis. 



Deseret road. House Range, Utah, locality on llo 



desiderata, see Elkania and Lingulella. 

 desmopleura, see Eoorthis. 

 desmopleura nympha, see Eoorthis. 



Deudraeth, Wales, locality at 366p 



Devils Lake, Wisconsin, localities near 81, 81b, 81o, 328 



Deweys Bridge, New York, localities near 109, 367k 



diablo, see Eoorthis. 

 dice, see Billingsella. 

 Dicellocephalus, see Dikellocephalus. 



Dicellomus, described 571 



articulating processes discussed 307 



cardinal area discussed 304 



classification of 321 , 323 



compared with Acrotreta 312 



Curticia 369 



Linnarssonella tennesseensis 670 



Oholella 592 



Obolus 312 



387 



Obolus chinen,sis 



evolution discussed 



evolution of 



general geographic and stratigraphic distribution of 

 the species referred to 



