INDEX. 



869 



tliyone, see EoortJiis. 



'' Thysanotos," compared with "Acritis," " Euoboliis/' and 



" Schmidtia, by Miclavitz 434 



mentioned 437 



TiC'onderoga, New York, locality near 367c 



Tihala, Esthonia, Russia, localities at 395a, 395h, 395n 



Tilcuya, Argentina, locality at 38913 



Timpahute Range, Nevada, locality in 313g 



Tinghianghien, China, locaUty near C37 



Tintic special quadrangle, Utah, localities in 34n, 34s 



Tischer, Esthonia, Russia, locaUty at 396h 



Toien, near Christiania, Norway, localities at 323 1', 323y, 323z 



Toll, E. von, bibliographic reference 24 



Toll Gate Canyon, White Mountain Range, California, locality in.. 8b 



Tombstone Gulch, near Bisbee, Arizona, locality in 14x 



Tomten, Norway , locahty at 324 



Tonto group (Middle Cambrian), localities in 73, 73b, 74, 74b 



Tonto group (Upper Cambrian), locaUty in 75 



"Tonto" sandstone (Middle Cambrian), localities in 17c, 73a, 74c 



mentioned 422, 516, 524, 558 



"Tonto" shale (Middle Cambrian), locaUty in 74d 



Tooele County, Utah, localities in 3c-e, 



lis, 15p, 15x, 32f-h, 32j, 32k, 32t, 32z, 33f, 34u, 34v, 329e 



Topsail Head, Conception Bay, Newfoundland, locaUties at 1, 



2a. 41a, 314e 

 Torellella laevigata, stratigraphic position of bowlder containing, 



discussed 454, 684 



ioTrentis, see Lingulella and Obolus. 



Torryburn, near St. John, New Brunswick, locaUties near 2s, 2t 



Tosterup, Sweden, locaUties at 310v, 323j, 323k, 



Towner's ranch, Lincoln County, Nevada, locaUty near 14m 



Town Knobs, Hawkins County, Tennessee, locaUties in 103, 



103a, 103b, 122 



Tradje, Sweden, locaUty at 321ii 



Transmedian (rotator) muscles, defined 295 



shown in figure 374 



Tansversa, see Acrotreta sagittalis, Linnarssonella, and Nisusiafcs- 

 tinata. 



Transverse axis, defined 295 



Trapezoidal area, defined 296 



Tremadoc, Wales, localities at and near 305c, 305d, 318t, 3661 



Tremadoc (Upper Cambrian), in generalized section for England, 



Scotland, and Wales, listing species and localities 135 



Tremadoc, Lower (Upper Cambrian), locaUties in 305, 305c, 305f-j 



Tremadoc, Upper (Upper Cambrian), locaUties in. 305a, 305e, 366p, 366q 



Tremadoc shale (Upper Cambrian), locality in 318w 



Tremalis, compared with Discinolepis 664 



^' pannulus," type species of Micromiira (IpMdella) 359 



Trp/matoholus, described 615 



articulating processes discussed 307 



cardinal area discussed 305 



classification of 321 , 324 



compared with Acrolhele 631 



Dearbornia 313. P14 



Obolella 587, 588 



Obolus 313 



SchizUmbon '. 313 



SiphonotTcta 313 



yorkia ? washingtonensis 613 



evolution discussed 319 



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 



reference to, of Trematobolus exceUis discussed 615 



shell substance 297 



surface ornamentation discussed 302 



type species Trematobolus insignis. 61 6 



vascular markings discussed 311 



excelsis, described 61 7 



cardinal area discussed 305 



compared with Dearbornia clarki 615 



Trematobolus kempanum 615 



general geographic and stratigraphic distribution tab- 

 ulated 104 



oldest known brachiopod 316,616 



typQ specimen figured PI. LXXXII, fig. 8 



Trematobolus insignifi, described 617 



described and discussed G16 



compared with Trematobolus exceMs 617 



Trematobolus kempanum 616, 620 



Trematobolus pristinus 616, 621 



Yorkia 611 



general geographic and stratigraphic distribution tab- 

 ulated 104 



type of Trematobolus 616 



tJTie specimen figured PI. LXXXIV, fig. 5 



kempanum, described 619 



compared with Trematobolus excelsis 615,617 



Trematobolus insignis 616, 618, 619 



Trematobolus pristinus 621, 622 



general geographic and stratigraphic distribution tab- 

 ulated 104 



type specimen not figured. 



pristinus, described ". 621 



compared with Trematobolus insignis 616,618,619 



general geographic and stratigraphic distribution 



tabulated 104 



type specimen figured '. . PI. LXXXIII, fig. 2f 



Trempealeau, Wisconsin, localities at and near 83, 



83', 833, 834, 135, 135b, 135c, 328g 



Trempealeau Ck)unty, Wisconsin, locaUties in 79x, 



83, 83', 833, 83S 100a, 135, 135b, 135c, 328g 

 triangularis, see Obolus. 



Trimerella, classification 310 



compared with " Lakkmina linguloides " 566 



Neobolus warthi 566 



development mentioned 561 



Hall and Clarke on development of 309 



mentioned 297 



platform mentioned 309 



" lindstromi,' ' compared with Neobolus warthi 565 



Trimerellidae, development of 310 



Trinity Bay, Newfoundland, locaUties on 51, 



5n, 5o, 6g, 6h, 6w, 6y, 314, 314b, 3141 

 triparilis, see Lingulella. 



" Triplesia lateralis," described 798 



type of Syntrophia 798 



" Triplesia primordialis," mentioned 798 



Trois Pistoles, Quebec, age and relations of conglomerate at 350,351 



locaUties at 2n, 3191 



Trout Brook, Cape Breton, locality near 325a 



Trout Creek, near Manitou, Colorado, localities on 360a, 360g 



Troy, New York, fauna at, discussed 472-473 



locaUties at and near 2b, 2d, 27, 27a, 44a, 338q, 367, 367b, 3671 



Troy quadrangle, New York, locaUties in 2b, 



2d, 27, 27a, 44a, 338q, 367, 3671 



Trubin, Bohemia, locality at 303a 



Truthville, New York, locality near 38a 



Trwyn-y-Iago, North Wales, locaUty at 3051 



Tschurskaja Station, Siberia, locality near 347 



Tsinan, China, localities near C54, 056, C67 



TuUberg, S. A., species named for 790 



tullbergi, see Eoorthis. 

 tumida, see Lingulella. 



Tungyu, Chin^, locaUty near C71 



Turkeyto^vn, Alabama, locality near 145 



Turner, H. W., bibliographic reference 24 



species named for 660 



turneri, see Acrolhele. 



Tursel, Esthonia, Russia, locality at 337f 



Twobit, Black Hills, South Dakota, locaUty near 17k 



Twomile Canyon, near Malade, Idaho, localities in 4y, 



5a-c, 5h, 54s, 54t-x, 55d 



Tyler Springs, House Range, Utah, locality near 8k 



typicalis, see ScJiizambon. 



Uinta County, Wyoming, localities in 4e, 4m-o, 302d, 3027 



Uinta Mountain uplift, sediments derived from 148 



Ulrich, E. 0., acknowledgments 13 



on spondylia of Cambrian and Ordovician Protremata 308 



species named for 714 



ulrichi, see Acrotreta. s 



Umbo, defined 296 



Umbonal cavity, defined 296 



Umbonal muscle, defined 296 



Umbonal muscle discussed 313 



