INDEX 437 



PAGE 



Dicellocephaltis, see Dikcloccpkahis. The original spelling has been re- 

 tained in the later numbers of this volume. 

 Dicellonius. pectenoides (Whitfield), listed from Eau Claire formation. .. . 358 



politus (Hall), listed from Eau Claire formation 358 



listed from Franconia formation 357 



prolificiis Walcott, compared with Lingidclla ? allani 232 



Dickhaut, H. E., fossils collected by 362 



difUciVis, see Bidentia. 



Dikelocephalinge Beecher, genera referred to, named 348 



in upper layers of Franconia horizon 357 



provisional reference of Conokcphalina misa to 388 



stratigraphic position of 353 



stratigraphic range of the genera of 358 



subfamily compared with Asaphidae and Olenidas 347 



subfamily constituted by Beecher 367 



Dikelocephalus Owen, genus described 363, 364 



genus named 273 



associated with Saukia falla.v in Texas 359 



compared with Calvinella 388 



Osceolia 385 



Saukia 348, 364, 374 



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 Crepicephalus under 



Dikelocephalinse 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 



Protichnites septemnotatus tracks left by 278 



referred to Dikelocephalinse 348 



relation of Conokcphalina to 387 



size of, discussed 364 



species previously referred to 349 



stratigraphic range of, discussed 364 



barabuensis {■= Platycolpus) , species referred by Whitfield '. . 366 



? baiibo Walcott (= Ptychaspis baubo (Walcott) ), former and pres- 

 ent generic reference 71 



belli (^ Anomocarella) , species referred by Billings 365 



bilobatiis, mention of, by Hall and Whitfield 366 



? brizo Walcott {:= Ptychaspis brizo (Walcott)), former and pres- 

 ent generic reference 71 



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

 cristatus (= Ptychaspis), species referred by Billings 365 



