440 INDEX 



Dikelocephalus — Continued. page 



speciosus, listed from " Saratogian," Hoyt quarry 253 



spiniger Hall, genotype of CalvincUa 389 



(:= Saukia), species referred by Hall 365 



new genus Calvinella, founded on 388 



referred to a new genus 347 



to new genus Calvinella 387 



texanus Walcott, new species described 372 



figured, pi. 65, fig. 4 ." 402 



compared with Dikelocephalus minnesotensis 372 



Dikelocephalus vanhornei 372 



formation and locality 372 



listed from locality 70a 359 



under description of genus 367 



surface of, described 364 



iribulis Walcott, new species described 274 



figured, pi. 44, figs. 8, 8a 294 



associated with Dikelocephalus hartti 274 



compared with Dikelocephalus misa 274 



listed from Potsdam-Hoyt fauna 254 



? tribulis Walcott, described 372 



figured, pi. 63, figs. 8-10, loa 398 



compared with Conokephaliiia misa and Saukia 372 



Dikelocephalus hartti 372 



formation and locality 372 



in synonymy 372 



listed under description of genus 367 



vanhornei Walcott, new species described 373 



figured, pi. 62, figs. 1-3 396 



compared with Dikelocephalus ? dalyi 368 



Dikelocephalus minnesotensis Z72i 



Dikelocephalus texanus 2>7'-^ 



formation and locality 373 



listed under description of genus 367 



size of, discussed 364 



sp. undt., described (footnote) 391 



compared with Dikelocephalus minnesotensis and D. limbatus 



( footnote) 391 



listed under description of genus 367 



? (Ccntropleura f) discordalus (= Perhaps Anoniocare ?), species 



referred by Salter 366 



{Ccntropleura ?) furca (= Dikelocephalina Brogger ??), species 



referred by Salter 366 



f (Ccntropleura ?) sp. {=Anomocare ?), species referred by Salter. 366 



Dikelokephalina, species referred to, by Brogger 366 



Dipleurula ancestor, diagrammatic reconstruction of imagined primitive. . . 43 

 Discinopsis sulcatus Walcott (^Craniella ?? sp. Walcott), present and 



former generic reference 71 



discoideus, see Oholus. 

 disjuncta, see Oesia. 



