ART. 4 CAMBRIAN CONCHOSTRACA — ULRICH AND BASSLER 9 



Bradoria rugosa Matthew = Bradoria robusta. 

 Bradoria rugulosa Matthew 



Lower Cambrian (Etcheminian, E16, Elc, E2a, E2c, E3e). 



Bradoria scrutator Matthew Lower Cambrian (Echeminian, E3c-E3/). 



Bradoria spectator (Matthew) 



Lower Cambrian (Etcheminian, Elc, Eld, E2&, E3e). 

 Bradoria spectator spinosa (Matthew) .Lower Cambrian (Etcheminian, E3d, Ele). 



Bradoria? steadi (Matthew) Lower Cambrian (Hanfordian, C161). 



Bradoria stereope W alcott = Aluta stereope. 



Bradoria subquadrata, new name (Bradorona spectator acuta Matthew) 



Lower Cambrian (Etcheminian, Eld). 



Bradoria tontoensis, new species Middle Cambrian (Arizona) . 



Bradoria vigilans Matthew Lower Cambrian (Etcheminian, E26, E3d, E3e). 



Bradoria vigilans (part) = Bradoria obesa. 



Bradoria vigilans concentrica, new varietj'.. Lower Cambrian (Etcheminian, E3d). 



Bradoria vigilans obesa Matthew = Bradona obesa. 



Bradoria woodi Yf sXcott = Alula woodi. 



Bradorona Matthew =Brador{a. 



Bradorona nitida Wiman = Bradona niiida. 



Bradorona observator Matthew = Bradoria perspictor. 



Bradorona observator benepuncta Matthew =Bradorfo benepuncta. 



Bradorona observator mut laevis Matthew = Bradoria rugulosa. 



Bradorona observator mut ligata = Bradoria scrutator and B. acuta. 



Bradorona perspicator Matthew = Bradoria perspicator. 



Bradorona perspicator mut magna Matthew = Bradorm robusta. 



Bradorona perspicator mut major Mat thew= Bradoria robusta. 



Bradorona perspicator mut maxima Matthew = Bradoria robusta. 



Bradorona spectator Matthew = Bradoria spectator. 



Bradorona spectator var. acuta Matthew = Bradoria subquadrata. 



Bradorona spectator mut aequaia Matthew = Bradoria spectator spinosa. 



Bradorona spectator mut spinosa Matthew = Bradoria spectator spinosa. 



Bythocypris polita StexisloS = Lepiditta polita. 



Dielymella, new genus. 



Dielymella appressa, new species Middle Cambrian (Arizona) . 



Dielymella brevis, new species Lower Cambrian (Vermont) . 



Dielymella dorsalis, new species Middle Cambrian (Arizona) . 



Dielymella nasuta, new species Middle Cambrian (Arizona) . 



Dielymella recticardinalis , new species Middle Cambrian (Arizona). 



Dielymella recticardinalis angustata, new variety Middle Cambrian (Arizona). 



Entomidellaf buprestis (Salter) Cambrian (Wales); Hanfordian, C1&2). 



Entomis buprestis Jones=Entomidella buprestis. 

 Eremos Westergaard. 



Eremos bryograptorum Westergaard Canadian (Sweden) . 



Escasona Matthew = Bey richona. 



Escasonaf ingens Matthew. Not recognizable -Lower Cambrian (Coldbrookian), 



Escasonaf ovata Matthew = Bey richona ovata. 



Escasona rutellum Matthew ^=Beyrichona? rutellum. 



Escasona? vetus Matthew. Not recognizable 



Lower Cambrian (Etcheminian; Eld). 

 Fordilla Walcott. 



Fordilla troyensis Walcott Lower Cambrian (New York). 



Hipponicharion Matthew. 



Hipponicharion cavatum Lower Cambrian (Hanfordian, C161-C163). 



Hipponicharion confluens, new species Middle Cambrian (Acadian, C261) . 



