90 NEW YORK STATE MUSEUM 



5 Black compact limestone (continued) 



Christiania trentonensis sp. nov. c 



Orthis tricenaria Hall c 



Platystrophia biforata SchlotJieim sp. c 



Dalmanella testudinaria Batman sp. c 



Whitella ventricosa Ball sp. rr 



Ctenodonta sp. indet. rr 



O. cf. astartaeformis Salter r 



Protowarthia cancellata Hall sp. r 



Conradella compressa Conrad sp. r 



Oarinaropsis carinata Hall r 



Lophospira bicincta Hall sp. r 



Liospira americana Billings sp. rr 



Eccyliopterus spiralis sp. nov. rr 



Holopea paludiniformis Hall rr 



Conularia cf. trentonensis Hall rr 



Zitteloceras hallianum d'Oroigny sp. rr 



Tretaspis reticulata sp. nov. cc 



T. diademata sp. nov. rr 



Ampyx (Loncliodomas) hastatus sp. nov. cc 



Remopleurides linguatus sp. nov. cc 



Isotelus maximus Locke c 



Illaenus americanns Billings c 



Cyphaspis matutina sp. nov. r 



Bronteus lunatus Billings rr 



Calymmene senaria Conrad rr 



Pterygometopus callicephalus Hall sp. c 



Ceraurus pleurexanthemus Green sp. c 



Cybele sp. rr 



Sphaerocoryphe major sp. nov. r 



Isochilina armata Walcott, var. pygmaea var. nov. r 



Primitia mundula Miller, var. jonesi var. nov. r 



Aparchites minutissimus Hall sp., var. robustus var. nov. c 



Bythocypris cylindi'ica Hall sp. r 



6 Reddish gray compact limestone 



Rafinesquina alternata Conrad sp. r 



Dalmanella testudinaria Dalman sp. r 



Triplecia nucleus Hall r 



Protozyga exigua Hall e 



Oarinaropsis carinata Hall r 



Gerasaphes ulrichana Clarke sp. rr 



Ampyx hastatus sp. nov. r 



Remopleurides linguatus sp. nov. r 



R. tumidulus sp. nov. rr 



Pterygometopus callicephalus Green sp. r 



Leperditia resplendens sp. nov. c 



