ART. 4 CAMBRIAN CONCHOSTRACA — ULRICH AND BASSLER 7 



Ca mbrian — Contio ued . 



Lower Cambrian — Continued, 



Division E36. 



Division E3a (13^, ISU) {Bradoria acuta, B. curta). 



Division E2c (13e, 3440 {Bradoria acuta, B. rugulosa) 



Division E26 (10^, lOp', 10^", lOg) {Bradoria acuta, B. 

 benepuncta, B. benepuncta spissa, B. elongata, B. medialis, 

 B. obesa, B. ovalis, B. perspicator, B. robusta, B. spectator, 

 B. vigilans). 



Division E2a {ISd, I3d', ISd", I3g) {Bradoria benepuncta, 

 B. perspicator, B. robusta, B. rugulosa). 



Division Ele (344^) {Bradoria spectator spinosa, B. ovalis). 



Division Elc^ (13i", 344c?, 344e) {Bradoria acuta, B. bene- 

 puncta, B. concinna, B. obesa, B. perspicator, B. robusta, 

 B. spectator, B. subquadrata). 



Division Elc (344^) {Bradoria acuta, B. benepuncta, B. con- 

 cinna, B. obesa, B. ornata, B. robusta, B. rugulosa, B. 

 perspicator, B. spectator). 



Division E6 {13t, 13t', 344k) {Bradoria acuta, B. benepuncta, 

 B. benepuncta spissa, B. obesa, B. robusta, B. robusta 

 longula, B. rugulosa, B. spectator). 



Division El a. 

 Lower Cambrian (Coldbrookian, Matthew, 1903) (13^, 344/) 

 {Bradoria ovalis prima, Escasona ingens) . 



An alphabetic list with cross references and the geologic occurrence 

 of the species treated in this paper follows. 



ALPHABETIC LIST OF NAMES APPLIED TO CAMBRIAN CONCHO- 

 STRACA 

 Aluta Matthew. 



Aluta bergeroni (Walcott) Middle Cambrian (China). 



Aluta douvillei (Mansuy) Cambrian (Yunnan) . 



Aluia enyo (Walcott) Middle Cambrian (China). 



Aluta eros (Walcott) Middle Cambrian (China). 



Aluta flexilis Matthew Middle Cambrian (Acadian, C1C2). 



Aluta fragilis (Walcott) Middle Cambrian (China). 



Aluta hollii (Jones) Cambrian-Menevian (Wales). 



Aluta primordialis (Linnarsson) Middle Cambrian (Sweden). 



Aluta rirmdata, new species Middle Cambrian (British Columbia). 



Aluta rotundata (Walcott) Lower Cambrian (New York). 



Aluta stereope (Walcott) Middle Cambrian (China). 



Aluta troyensis (Ford) Lower Cambrian (New York). 



Aluta woodi (Walcott) Middle Cambrian (China). 



Aparchites anderssoni Wiman — Indiana anderssoni. 

 Aparchiies fennicus 'Wiinan = Bradoria fennicus. 

 Aparchites robustus Matthew= Bradoria robusta. 

 Aparchites secunda Matthew =/ndiana secunda. 

 Arisiozoe rotundata Walcott= AZwia rotundata. 



