818 



CAMBRIAN BRACHIOPODA. 



amhigua, see Elkania. 



Ami, Henry M., acknowledgments 12 



bibliographic reference 13 



species named for 731 



amii, see Nisusia (Jamcsella). 



Amis post office, Tennessee, locality near 121a 



Amour, see Point Amour. 

 ampla, see Lingulella. 

 anceps, see Obolus. 

 ancillus, see Obolus. 



Anderson County, Tennessee, localities in 7d, 374a 



Andrarum, Sweden, localities at 8w, 



3101, 320c, 320f, 3201, 320o, 320x, 321y, 390o 

 Andrarum limestone (Middle Cambrian), in generalized section for 

 Sweden, Denmark, Finland, and Norway, listing species 

 and localities 145 



localities in 320c,334b, 334e 



"Annelid sandstone," mentioned 539 



anomala, see Wimanella. 



"AnomUes lenticularis," type of Orusia 765 



A nopolenus, association mentioned 498 



venustus, association mentioned 498 



Anse au Loup, see L'Anse au Loup. 



Antelope Spring, House Range, Utah, localities near 3s, 



3t, 3x, 3y, 4, 8g, 8i, 8k, lie, llx, 30d, 31s, 31v 



Antelope Valley, Eureka District, Nevada, locality in 59 



Anterior lateral (retractor) muscles, defined 292 



shown in figure 374 



Anterior region, defined 292 



antiquata, see Swantonia. 

 antiquissimus, see Obolus (Acritis). 



Aparchites? aTiderssonij stratigraphic position of bowlder contain- 

 ing, discussed 454, 684 



Apatocephalus zone (passage beds), in generalized section for Swe- 

 den, Denmark, Finland, and Norway, listing species and 

 localities 144 



locality in 390e 



Apex, defined 292 



Apical callosity, defined 292 



apolUnis, see Obolus. 

 apolUnis ingricus, see Obolus. 

 apollinis maximus, see Obolus. 

 apolUnis quenstedti, see Obolus. 

 appalachia, see BillingseUa and Dkellomus. 



Appalachian province, Cambrian species in, listed 114-119 



Arbuckle limestone (Upper Cambrian), detailed section, listing 



included and correlated species and localities 141-142 



localities in 9z, 12j, 12m 



Arbuckle Mountains, Oklahoma, detailed section of Cambrian and 



Ordovician in, listing species and localities 141-142 



locality in 12p 



ArchseocyathiuEe white limestone (Middle? Cambrian), locality 



in 315c 



ATchseocijatJiuSy association mentioned 5S4 



Archangel Quarry, near St. Petersbiu-g, Russia, locality at 336x 



Areola, Minnesota, locality at 339b 



ArdmiUan Brae, Scotland, locality at 316a 



Ardmore quadrangle, Oklahorna, localities in 12h, 12m, 12n 



Ardrossan, Yorke Peninsula, South Australia, locality near 315a 



Area, defined 292 



shown in figure 374 



Arenig, in generalized section for England, Scotland, and Wales.. 135 



Arenig, North Wales, locality in 305e 



Argenta, Big Cottonwood Canyon, Utah, locality near 30a 



argenta, see Acrotreta and Nisusia (Jamesclla). 



Argentina, Cambrian species of, listed 122 



localities in 389, 389a-d 



argia, see Syntrophia primordialis. 

 arguta, see Lingulella. 

 Argyle, see South Argyle. 



A rioncllus, association mentioned 598, 600, 767 



Arizona, Cambrian species of, listed 114-119 



Dicellomus poUtus from, discussed 577 



localities in.. 9o, 14x, 17c, 73, 73a, 73b, 74, 74b-d, 75, 358, 358a-b 



stratigraphic position of brachiopod locahties in, discussed.. 124 



Armstrong Creek, Tennessee, locality near ■. . 11a 



artcmis, see Acrothele. 



Artieulata, distribution in Cambrian strata 316 



shell structure of 296 



Articulate brachiopods, defined 292 



Articulating processes, discussed 307 



" Asaphellus iauno.,'' mentioned 679 



AsapheUus zone, in generaUzed section for Cape Breton, listing in- 

 eluded species and localities 131 



Asaphiscus wheeleri, association mentioned 658 



Asaphus broggeri zone, in generahzed section for Russia 143 



Asaphus eichwaldi zone, in generalized section for Russia 143 



Asaphus expansus zone, in generalized section for Russia 143 



Asaphus lepidurus zone, in generalized section for Russia 143 



Asaphus rankeps zone (Ordovician), in generahzed section for 



Russia 143 



locality in 337j 



Ash Creek, Arizona, locality on 358a 



Asia, zoologic list of Cambrian species of, giving distribution by 



countries 121-122 



asiatica, see OboUlla. 



Asserien, Esthonia, Russia, localities at 395c, 395j, 395p, 395s 



Asterisks in localities, explanation of 160 



atava, see Eoorthis and Lingulella. 

 atava insulx, see Lingulella. 



Atherstone, England, locality in 304j 



atlantica, see Obolella. 



Atlantic coast province, Cambrian species in, listed 114-119 



Atremata, cardinal area discussed 303-304 



classification of 322 



defined 292 



derivation 327 



distribution in Cambrian strata 316 



evolution of genera of, discussed 318-319 



genera and species referred to, described 327-585 



boloperipheral growth of pseudodeltidia in 306 



muscle scars discussed 312 



pedicle furrow discussed 314 



surface ornamentation discussed 301 



vascular markings discussed 311 



atrypoideSj see Orusia lenticularis. 



Attalla, Alabama, locality at 361 



attenuata, see A crotreta . 

 attenuata var. ?, see Acrotreta. 

 Attleboro, see North Attleboro. 

 auga, see Lingulella. 



"A ulonotreta polita," mentioned 383 



aurora, see Obolus (Westonia). 



Aurum, Schell Creek Range, Nevada, locality near 8o 



Ausable Chasm, New York, localities in 77, 338t 



Ausable River, New York, locality on 338s 



Australia, see South Australia. 

 Austria-Hungary, see Bohemia. 

 avia, see Acrothele. 

 avia puteis, see Acrothele. 



'' Avicula desquamata," discussed 594 



Ayrshire, Scotland, locality in 316a 



A, treated as A in this index. 

 babel, see Acrotreta. 

 bailcyi, see Acrotreta. 



Bala, North Wales, localities near 366m, 366o 



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

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



localities 135 



locality in 304ii 



Bala Road, North Wales, localities on 305f, 366j 



Bala schists (Upper Cambrian), locality in 366o 



Balbriggan, Ireland, locality at 317a 



Balcletchie, Scotland, locality at 316a 



Bald Mountain, Bighorn Mountains, Wyoming, locality near 170 



Bald Mountain, Washington County, New York, localities near. . 35, 



35a, 338h, 338z 



Baldwin's ranch, Texas, locality at 14c 



Baltic region, localities in 395f, 396e, 396f, 396o 



See also Esthonia, Finland, Sweden, etc. 

 balticv^, see Obolus ( Westonia). 



Baltischport, Esthonia, Russia, localities at 336h, 



336m, 336r, 337i, 3371, 395x, 396, 396x 



Baltiscbport Peninsula, Esthonia, Russia, localities on 396a, 396ii 



"Bande de Jinec" (Middle Cambrian), locality in 345b 



Bangor, North Wales, locality in 366d 



Baraboo, Wisconsin, localities near lOv, 116 



Baraboo quadrangle, Wisconsin, localities in lOv, 116 



