568 INDEX 



Lingulella — Continued. page 



ibicus, new species, Ozarkian 473, 479 



compared 493, 494, 495 



described '. 49* 



figured, pi. 108, figs. 5-8; pi. 109, figs. 8, 9 536, 537 



isse Walcott, compared 493 



lepis Salter, compared 496 



manticula White 474 



compared 49 2 



miltoni, new species, Ozarkian, described 492 



figured, pi. 122, figs. 1-4 550 



moosensis Walcott 471, 480 



nechos, new species, Ordovician, described 492 



figured, pi. 108, figs. 12, 12a 536 



nepos, new species, Ozarkian, described 493 



figured, pi. 108, figs. 9-1 1 536 



nerva, new species, Ozarkian, described 493 



figured, pi. 108, figs. 13, 13a, 14 536 



ninus, new species, Ozarkian, compared 493, 495 



described 494 



figured, pi. 108, figs. 15, 16 536 



perattenuata Whitfield, compared 494 



pogonipensis (Walcott) 476 



randomensis Walcott, compared 491 



remus, new species, Ozarkian, compared 492, 493, 494 



described 494 



figured, pi. 109, figs. 2, 2a, 3 537 



rotundata Walcott, compared 490 



siliqua, new species, Upper Cambrian, described 495 



figured, pi. 108, figs. 17-19; ph 109, fig. 1 536, 537 



similis, compared 495 



sp. undt 471, 472 



waptaensis, new species, Middle Cambrian, described 496 



figured, pi. 122, figs. 5-8 550 



Lingulepis, compared 482 



acuminata (Conrad) 489 



exigua (Matthew) , compared 489 



nabis, new species, Ozarkian, described 489 



figured, pi. 109, figs. 4-7 537 



spatula Walcott, compared 489 



Lophospira laodice Walcott 472 



Lower Ozarkian in Alberta 470 



Lyell formation (Cambrian, Upper) 460 



fauna 461 



Lyssacina Zittel, sub-order characterized 301 



Malacostraca, compared with Calymene and Ceraurus 151 



relation to Trilobita 168 



respiration 164 



Maladia americana Walcott 475 



