NO. 13 DIKELOCEPHALUS AND OTHER GENERA 



INDEX 



The references in heavy=faced type refer to the locality numbers and the 

 pages upon which the genera and species are described and figured. 



PAGE 



Acrothele sp., listed from locality 201a 359 



Acrotreta idahocnsis Meek, listed from locality 201a 359 



spinosa Walcott, listed from locality 62 361 



Adams Hill, Nevada. Upper Cambrian locality 62 361 



Adirondack Mountains, geographic distribution of Dikclocephalus in.... 364 

 aMnis, see Euloma. 



Aglaspis harrandei Hall, listed with St. Lawrence fauna 356 



listed from localities 85 and 86 360 



eatoni Whitfield, listed with St. Lawrence fauna 356 



listed from locality 85 360 



Agnosftts communis Hall and Whitfield, listed from locality 62 361 



listed from locality 66 362 



disparilis Hall, listed with St. Lawrence fauna 356 



josepha Hall, listed from Eau Claire formation 358 



listed from Franconia formation 357 



parilis Hall, listed from Franconia formation 357 



prolongus Hall and Whitfield, listed from locality 201a 359 



listed from locality 62 361 



tnviidosus Hall and Whitfield, listed from locality 66 362 



Agraulos ? annectans (Walcott), listed from locality 201a 359 



thea Walcott, listed from Eau Claire formation 358 



F ihca Walcott, listed from Eau Claire formation 358 



Eau Claire sandstones especially marked by 358 



sp. undt., listed from Eau Claire formation 358 



? sp. undt., listed from Jordan formation 355 



amcricana, see Arethusina. 



Amphion ?? sp. undt., listed from locality 201a 359 



anatina, see Conaspis. 

 anatinus, see Conocephalitcs. 

 angustifrons, see Lisania. 

 annectans, see Agraulos. 



Anomocarc, compared with Calvinella 388 



compared with Calvinella spiniger 391 



Dikclocephalus ? dalyi compared with 367 



intermediate between Dikelocephalus and 368 



probable species of, bracketed as Pterocephalus by Hall 



and Whitfield 366 



angelini Gronwall, placed by Lorenz under Conaspis (footnote)... 357 



? parvula Weller, listed from locality lie 362 



sp. undt, listed from Eau Claire formation 358 



