108 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 7s 



EXPLANATION OF PLATES 

 Plate 1 



Unless otherwise stated, all the figures on this plate are copied from Matthew's 

 work and represent his figured types, to which, in almost all cases, we have had 

 o restrict his species. Page 



Figures 1-5. Bradoria robusta Matthew (see also pi. 2, figs. 1-4) 22 



1. Aparchites robusta Matthew, X 4 (C16). 



2. Leperditia rugosa Matthew, X 4 (E3/). 



3. Bradorona perspicator maxima Matthew, X 4 (Elc). 



4. Bradorona perspicator major Matthew, X 4 (E3/). 



5. Bradorona perspicator magna Matthew, X 4 (E26). 



6-9. Bradoria perspicator Matthew (see also pi. 3, fig. 12) 24 



6. Bradoria perspicator Matthew, X 4 (Eld). 



7. Bradoria observator Matthew, X 4 (Eld). 



8, 9. Outlines of the types of Bradoria perspicator 

 Matthew, X 5 (Eld). 

 10. Bradoria cambrica Matthew, X 6 (C163) (see also pi. 3, 



figs. 14, 15) 28 



11, 12. Bradoria scrutator Matthew (see also pi. 3, fig. 11) 14 



11. The type, a left valve, X 6 with ventral portion 



hidden by matrix (E3e). 



12. Bradoria observator ligata Matthew, X 4 (E3e). 



13, 14. Bradoria oculaia Matthew 16 



Left valve of the type, X 6 and dorsal view of the 

 entire carapace (C163). 



15. Bradoria vigilans Matthew. Right valve, X 6 (E3e) 16 



16. Bradoria (observator var.) benepuncta Matthew, X 4 (Eld) 



(see also pi. 2, figs. 6, 7, pi. 3, fig. 7) 18 



17. Bradoria rug ulosa Matthew, X 4 (E3e) 21 



18. Bradoria {Indiana) ovalis Matthew, X 5 (Ele, E3e) (see 



also pi. 3, fig. 6) 21 



19. Bradoria {Bradorona) spectator Matthew, X 4 (Elc) 25 



20,21. Bradoria spectator spinosa Matthew 26 



20. The type specimen, X 4 (Elc). 



21. Type of Bradorona spectator aequata Matthew, X 4 



(E3d). 



22. Bradoria (Leperditia) minor Matthew, X 5 (C163) 29 



23. Bradoria (Leperditia) steadi Matthew, X 1 (C161) 29 



24. Bradoria ornaia Matthew, X 6 (Elc) 30 



25. Bradoria (Schmidtella) acuta Matthew, X 6 (E3c) (see also 



pi. 3, figs. 1, 2) 19 



26. " Schm,idtella ? pervetus " Matthew, X 6 (E3e). Too poorly 



served to be recognized 27 



27. Bradoria (vigilans var.) obesa Matthew, X 6 (E16) (see also 



pi. 3, fig. 13) 27 



28. Bradoria (aurora) Matthew?, X 4 (C161) 30 



29. Bradoria (Beyrichia) primaeva Matthew, X 4 (C162) 29 



30. Indiana ovalis prima Matthew, X 4. Lower Cambrian 



(Coldbrookian) 21 



31. Escasona ingens Matthew, X 4. Lower Cambrian (Cold- 



brookian) 48 



32. Escasona rutellum Matthew, X 5 (E3/) 48 



33. Escasona vetus Matthew, X 5 (Eld) 49 



34. Modiolopsis thecoides Matthew, X 4. Lower Cambrian 



(Etcheminian) : Newfoundland 102 



