INDEX. 



861 



■perpasta subquadrata, see Nisusia (Jamesella). 

 perugata, see Kutorgina. 



Peterson, Utah, locality near 329c 



Pewardine, England, locality at 304k 



pMon, see Lingulella. 

 plieres, see Oholiis. 



J^hilhedTa, described 724 



cardinal area, discussed 305 



classification of -. 321, 325 



evolution of 317 



general geographic and stratigraphic distribution of 



the species referred to 107 



general stratigraphic distribution and number of Cam- 

 brian species and varieties of HI 



' muscle scars, not sho\vn in 313 



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



occurrence in Cambrian, discussed 319 



type species " Patella rivulosa" 724 



Columbiana, described 724 



general geographic and stratigraphic distribution 



tabulated 107 



type specimen figured PI. LXXXI, fig. 10 



PhilUps, J., bibliographic reference 22 



species named for 352 



Phillipsburgh, Quebec, localities at 3921, 392m 



Phillipsburgh formation (Lower Ordovician), mentioned 319f 



Phiilipsburg quadrangle, Montana, localities in 302q, 302r, 340e 



philUpsi, see Micromitra (Patcrina). 



Pholidops impUcata, compared withBicia wTiiteavesi 568 



-Phyllograptus slate (Passage beds), in generalized section for 

 Sweden, Denmark, Finland, and Norway, listing species 



and localities 144 



localities in 323, 3231 



Pike View, near Colorado Springs, Colorado, locality near 360d 



^ileolus, see Orbiculoidea. 



Pilot Blnob, Wisconsin, locality near 99a 



Pinal County, Arizona, locality in 358a 



Pinnacle Peak, Eureka district, Nevada, locality near 65 



Pioche, Nevada, localities near 7k, 31, 31a, 31u, 333a, 333b 



Pioche formation (Lower Cambrian), in detailed section in House 

 Range, Utah, listing included, and correlated species and 



localities 158 



localities in 41?, 31a, 331, 52? 



species and localities in Nevada correlated with 140 



I^lstsiomys ? defleda group, classification of, by Uhich 308 



Tlanilimhata limestone, in generalized section for Sweden, Den- 

 mark, Finland, and Norway, listing species and localities. 144 

 See also Megalaspis planilimbata zone. 



Platform, defined 295 



discussed 309-310 



Hall and Clarke on 309 



Platform-bearing brachiopods, development of 309 



Tlatystrophia, classification of, by Ulrich : 308 



compared with EoortJiis remnicha 787 



no Cambrian representatives 320 



TlectoTthis, classification of, by Ulrich 308 



discussed 772 



muscle scars of, discussed by Ulrich 308 



no Cambrian representatives 320 



reference to, of Protorthis hunnebergensis discussed 741 



See also Orthis (Plcctorthis). 



plicaiella, shell section figured text fig. 12, 299 



whilfiddi, compared with Billingsella by Ulrich 308 



discussed by Ulrich 308 



muscle scars of, discussed by Ulrich 308 



Pleurocoeles, defined , . . . 295 



shown in figure 374 



vessels of, shown in figure 374 



plicatella, see Billingsella. 



Pdddrus, Esthonia, Russia, locality near 3376 



Podolova (Putalova?), St. Petersburg, Russia, locality at 366a 



pogonipensis, see Lingulella. 



Pogonip limestone, detailed section, listing included and corre- 

 lated species and localities 139 



mentioned 517, 688, 689, 777 



Pogonip limestone (Lower Ordovician), localities in. 63, 



201a, 202, 203, 204, 209, 214a, 214b, 221 

 Pogonip limestone (Passage beds), localities in 201, 203a, 211 



Point Amour, Labrador, locality at 3921 



Point Levis, Quebec, locaUties at 319, 319a, 319d, 3191, 392j 



Poland, Cambrian species of, hsted 120-121 



Pole Creek, Madison County, Montana, locality on 149a 



politusy see Dicdlomus. 



Polk County, Tennessee, locality in 128a 



Polk County, Wisconsin, localities in 78, 



78b, 78c, 78s, 82, 82s, 328b, 328e, 328f, 328h, 328ni, 328ii 



Polyphyma zone (Upper Cambrian), locality in 304b 



Pobjlccckia, compared v/ith Clarkdla 809 



"montancnsis," type of Clarkella 809 



Pompeckj, J. F., acknowledgments 12 



bibliographic references 22 



Pont Nant-y-Ladron, Wales, localities at 305f , 366j 



Popes Peak, Alberta, locality near 35e _ 



Popo Agie Canyon, see Middle Popo Agie Canyon. 



Popowka, St. Petersburg, Russia, localities at 336, 336y, 337in 



Porters Brook, New Brunswick, locaUties on 301 1, 301m 



Porthclais Harbor, Wales, localities at 366b, 366c 



Port Henry, New York, localities near 136, 367g 



Porth-y-rhaw, South Wales, locaUties at , 318d, 318g 



Portland (St. John), New Brunswick, locaUties at.. 301g, 301w, 308h, 30Si 



Portland Creek, Newfoundland, locaUty near 314d 



Portmadoc, North Wales, locaUties at and near 318b, 366n, 366q 



Porto Canal Grande, see Canal Grande. 



Portugal, Cambrian species of, listed 120-121 



locality in 351 



Posen, Germany, locaUty in 386h 



Posterior region, defined 295 



Post Oak Springs, Tennessee, localities near 11, 13 



Potosi, Missouri, localities near He, 3691) 



"Potsdam formation," mentioned 624 



Potsdam sandstone (Upper Cambrian), locaUties in 110, 



111, 136, 185, 185a, 338j, 338r-u, 338w, 392 



" Potsdam " strata, mentioned 527 



Poughkeepsie, New York, LinguZella (LiTigulepis) acuminata at, 



discussed 548 



locaUties near 108, 367e, 367j 



Poultney River, New York, locaUty on 34 



Powder River, Wyoming^ locality on 302x 



PoweU County, Montana, locaUties in 3j, 4q, 4q', 4v, 4w, 5j, 8j 



Powells Plateau, Arizona, locaUty near 74d 



Prairie du Sac, Wisconsin, localities at ' 85, 85s 



Praschno Augezd, Bohemia, locaUty at. 345g 



Prestorp , Sweden , locality at 390k 



pretiosa, see Acrothde and Mickwitzia. 



prima, see Acrothele, Acrothyra signata, and Lingulella. 



prima costata, see Acrothde. 



primseva, see Acrotliele, Acrotreta. and Lijigulella. 



primordiaXis, see EoortHs and SyntropMa. 



primoTdialis argia, see SyntropMa. 



Princeton, Montana, locality near 302r 



Prindle, L. M. , species named for 409 



prindlei, see Obolus. 



Printuf House, Gadsden, Alabama, locaUty near 138 



priscus, see Schizambon. 



pristinus, see Trematobolus. 



proavia, see Acrothyra. 



Productidse , cardinal process discussed 306 



cruralium mentioned 309 



" Produdus limestone," mentioned 511 



proles, see Acrothele. 

 prolificus, see Dicdlomus. 



Promontory Point, Utah, locaUty near 30u 



prospedensis, see Micromitra (Paterina). 



Prospect Mountain, Eureka district, Nevada, localities on 52, 54, 55 



Prospect Mountain limestone^ Eldorado limestone. 



Prospect Mountain quartzite, in detailed section in Eureka district, 



Nevada 140 



in detailed section in House Range, Utah 158 



Protegulum, defined 295 



"Protolcnus beds," mentioned : 499, 708 



''Proto/(?7iu5 fauna," mentioned 686 



Protolcnu^ zone, generalized section of beds referred to 132-133 



Ibl (Middle Cambrian) , localities in 2f , 2g, 301i, 308e? 



Ib2 (Middle Cambrian) , locaUties in 2h, 301 



lb3 (Middle Cambrian) , locaUties in 2i, 2k, 301a, SOSg? 



Ib5 (Middle Cambrian), locaUties in 301b, 301d, 301f 



