464 INDEX 



PAGE 



Alokistocare Lorenz, genus described 182 



compared with Acroccphalitcs 176, 183 



Macrotoxus 183 



formerly would have been included with Ptychoparia 177 



genotype, Conocephalitcs subcoronatus Hall and Whitfield. . . 183 



geographic distribution 183 



observations 183 



segments 183 



species compared 182 



stratigraphic range 183 



synonymy 182 



althca, new species, described 184 



figured pi. 25, figs. 3, 3a, 4, 4a 232 



compared with Alokistocare subcoronatum (Hall and Whit- 

 field) 187 



Ptychoparia striata and Acroccphalitcs americanus . ... 183 



formation and locality 184 



listed 7,7^, 374 



segments 183 



? labrosum, new species, described 184 



figured pi. 25, figs. 5, 5a 232 



compared with Acroccphalitcs 176, 185 



Alokistocare and Mcnomonia 185 



Alokistocare prospectense and A. linnarssoni 182 



Alokistocare subcoronatum 184 



formation and locality 185 



intermediate between Conoccphalites, Alokistocare, and Mcno- 

 monia 184-185 



listed 292 



linnarssoni (Walcott), described 185 



figured pi. 25, figs, y, ya 232 



compared with Alokistocare labrosum and A. ? prospectense. . 182 



Alokistocare ? prospectense 185, 187 



Alokistocare subcoronatum 184 



formation and locality 185 



synonymy 185 



po)nona, new species, described 186 



figured pi. 25, fig. 6 232 



compared with Alokistocare ticida 188 



Ptychoparia striata and Acroccphalitcs americanus. ... 183 



formation and locality 186 



listed 292 



observations 186 



segments 183 



F prospectense (Walcott), described 186 



figured pi. 25, fig. 8 232 



compared with Alokistocare labrosum and A. linnarssoni. . . . 182 



Alokistocare linnarssoni 185, 187 



Alokistocare subcoronatum 184 



