INDEX. 



865 



Sc/ii2a7«6on— Continued. 



type species ScMzambon typicalis 622 



vascular markings discussed 311 



canadensis, discussed 622 



? dodgei, discussed 622 



duplicimuratus, discussed 622 



? estkonia, described 622 



general geographic and stratigraphic distribution tabu- 

 lated 104 



type specimen figured PI. LXXXIV, fig. 4 



fissa, compared with ScMzambon ? estkonia 622 



lockei, discussed 622 



manitouensis, described 623 



general geographic and stratigraphic distribution tab- 

 ulated 104 



type specimen figured PI. LXXXIV, fig. 3 



priscus, described 623 



general geographic and stratigraphic distribution tab- 

 ulated 104 



type specimen not figured. 



typicalis, described 624 



compared with ScMzambon ? estkonia 622 



ScMzambon manitouensis 623 



ScMzambon priscus 623 



Sipkonotreta f dubia 620 



Trematobolus kempanum 620 



general geographic and stratigraphic distribution tab- 

 ulated 104 



type of ScMzambon 622 



type specimen figured PI. LXXXIV, fig. la 



SchizQcrania, compared with Discinolepis 664 



compared with Mickwitzia 331 



Schizopholis, described 608 



cardinal area discussed 305 



classification of. 321,324 



compared with Acrotreta 314 



evolution discussed 319 



evolution of , 317 



general geographic and stratigraphic distribution of the 



species referred to 104 



■ general stratigraphic distribution and number of 



Cambrian species and varieties of 110 



intermediate between Botsfordia and Acrotreta 602 



number of species of, in different types of sediment 160 



type species Schizopholis rugosa 609 



rugosa, described 609 



compared with Botsfordia 602 



general geographic and stratigraphic distribution tab- 

 ulated 104 



type of Schizopholis 609 



type specimen figured PI. LXXXI, figs. 1, la-b 



Sckizophoria , classification of by Ulrich 308 



muscle scars of, discussed by Ulrich 308 



Schizotreta, compared with Keyserlingia 628 



elliptica, compared ^vith Keyserlingia 628 



Schleswig-Holstein, Germany, locaUty in 386e 



Schmalensee, G., acknowledgments - 12 



mentioned 331 



species named for 411, 709 



schmalenseei, see Acrotreta and Obolus. 



Schmidt, Fr. , acknowledgments 11 



bibliographic references 23 



mentioned 3C7 



species named for 412 



subgenus named for 442 



schmidti, see Obolus. 



Schmidtia, compared with Leptembolon 378 



(Schmidtia), see Obolus (Sckmidlia). 



Sckmidtia conglomerate <Upper Cambrian), in generalized sec- 

 tion for Russia, hsting species and localities 143 



localities in 395s-u 



"Schmidtia celata," type of Obolus (Sckmidtia) 378, 442 



Schodack, New York, loeaUties at 29a, 338 



Schuchert, Charles, acknowledgments 13 



bibUographic references 23 



comparison of Lingulella and Lingulella (Lingulepis) by 544 



genus named for 585 



note on Cambrian spondylia and development of true 



orthids ' 308 



species named for 531 



terminology of 292 



Schuchert, Charles [Winchell, N. H., and], bibliographic reference. 26 

 sckuckerti, see Lingulella, 



Sckuchertina, described 585 



cardinal area discussed 304 



classification of 321, 323 



compared with Elkania '. 58 



evolution and classification discussed 585 



evolution discussed 319 



evolution of 317 



general geographic and stratigrapliic distribution of 



the species referred to 104 



general stratigraphic distribution and number of Cam- 

 brian species and varieties of 110 



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



shell structure 297 



stratigraphic position mentioned 318 



Cambria, described 585 



general geographic and stratigraphic distribution tab- 

 ulated 104 



surface ornamentation discussed 303 



type specimen fig^ired -. PI. LI, fig. 6b 



Schuchert inidfe, classification of. 321,323 



distribution in Cambrian strata 316 



genera and species referred to, described 585 



general stratigraphic 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 133 



Schuylerville quadrangle, New York, localities in 35, 



35a, 43, 338h, 338i, 338o, 338z 



Scipio, Utah, locality near 33 1 



scotica, see Micromitra. 



Scotland, Cambrian species of, listed 120-121 



generalized section of Cambrian and Ordovician in, listing 



species and locaUties 135-136 



localities in 316, 316a-d 



only Lingulella from 541 



f-culptill'i, see Micromitra. 

 snulptilis endlichi, see Micromitra. 



Seal Point Cove, Trinity Bay, Newfoundland, locality at '. 6w 



Secondary "vascular canals, shown in figure 374 



Secret Canyon, Eureka district, Nevada, locaUties in 551), 58 



Secret Canyon road. Eureka district, Nevada, locality on 204 



Secret Canyon shale (Middle Cambrian), detailed section, listing 



included and correlated species and localities 139 



localities in 58, 60 



Sections of brachiopod shells, preparation of 297 



Sedgwick, A., bibliographic reference 23 



Seebach, K. von, bibliographic reference 24 



species named for 710 



sepbachi, see Acrotreta. 



Segerberg, C. 0. [Moberg, J. C, and], bibliographic reference 21 



Selwyn, A. R. C, species named for 414 



', see Obolus. 



, discussed 310 



shown in figure 374 



f, see Obolus. 



Septal plates, defined 295 



sequens, see Lingulella {Lingulepis) acumJnata. 



sera, see Acroihyra. 



Serpulite grit, in generaUzed section for England, Scotland, and 



Wales, listing species and localities 136 



Sessile spondyhum, defined 295 



Setse, figured 362, 374 



Setal band, shown in figure 374 



Shadow Canyon, Eureka district, Nevada, locality near 202 



Shale, number of genera and species identified from 160 



Shale and limestone, number of genera and speciescommon to both. 160 

 Shale and sandstone, number of genera and species com m on to both 160 

 Shale, limestone, and sandstone, number of genera and species 



common to all three 160 



Shaler, N. S., and Foerste, A. F., bibliographic reference 24 



Shansi, China, localities in C37, C71, C72, C74, C75 



shansiensis, see Obolus. 



Shantimg, China, localities in Cl-7, 



C9, CIO, C12, C17, C20, C22, C23, C26, C28, 

 C36, C45, 054, 056, 057, 061-64, 067, C68 

 shantung ensis, see Acrotreta. 

 Sheep Creek, Wyoming, see Jackson Creek. 



Shelby County, Alabama, localities in 17b, 56c, 141a, 142, 164f 



shelbyensis, see Wimanella. 



62667 ''—VOL 51, pt 1—12- 



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