SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



Dikelocephaltts — Continued. page 



dimensions of genus 365 



entire specimens of (as restricted), not yet secured 347 



general discussion of species 359 



geographic distribution of 364 



included by Beecher with Asaphelina and Crcpicephahis under 



DikelocephaHnae Beecher 347 



in synonymy 363 



interpretation by Salter, cited ' 366 



investigation of, planned 346 



locality and associated fauna discussed 359 



observations on the genus 348, 365 



referred to DikelocephaHnae 348 



relation of Conokephalina to 387 



size of, discussed 364 



species previously referred to 349 



stratigraphic range of, discussed 364 



barabuensis (^Platycolpus), species referred by Whitfield 366 



belli (= Anomocarella), species referred by Billings 365 



bilobatus, mention of, by Hall and Whitfield 366 



celticus (= Distorted pygidia, genus ?), species referred by Salter. . 366 



cristatus (^Ptychaspis), species referred by Billings 365 



t dalyi, n. sp., described and discussed 367 



figured, pi. 64, figs. 1-5 400 



associated with lllccnurns elongaia n. sp 368 



compared with Anomocare and Anomocarella 367 



Dikelocephalus hartti 367 



Dikelocephalus minnesotensis 367 



formation and locality 368 



listed under description of genus 367 



stratigraphic position unknown 359 



eatoni (=PlaiycolpHs), species referred by Whitfield 366 



flabellifer Hall and Whitfield (= Apatokephalus ?) 366 



granulosus (= Ptychaspis), species named by Owen in 1852 365 



referred by Hall to Ptychaspis 366 



harfti (Walcott), described and discussed 368 



figured, pi. 63, figs. 1-7, 7a .398 



compared with Dikelocephalus f dalyi 367 



Dikelocephalus ? tribulis 372 



formation and locality 368,- 369 



in synonymy 368 



listed under description of genus 367 



surface of, described 364 



iowensis (= Crepiccphalus), species named by Owen in 1852 365 



referred by Hall to Conocephalites 366 



? limbatus Hall, described and discussed '369 



figured, pi. 65, figs. 5-8 408 



about Devils Lake, Wisconsin 360 



compared with Dikelocephalus minnesotensis 369 



Dikelocephalus sp. undt. (footnote) 391 



