118 PROCEEDIxVGS OF THE NATIONAL MUSEUM vol.78 



Page 

 Figures 14-16. Beyrichona gevalensis Wiman 47 



14. An imperfect valve, X 8. 



15, 16. Side and edge views of a right valve, X 8. 



Lower Cambrian, Olenellus sandstone: Biludden, 

 Sweden. 



17. Beyricho7ia faba Wiman 47 



A left valve, X 8. 



Lower Cambrian Olenellus sandstone: Limon, near 

 Gefle, Sweden. 



18,19. Selulla falax Wiman I... 49 



Side and edge views of a left valve, X 8. 

 Lower Cambrian, Olenellus sandstone: Biludden, 

 Sweden. 



20-23. Lepidilla anomala Matthew 100 



Four type specimens, X 15. 



Middle Cambrian (Acadian Clc2) : Ilanford Brook, 

 New Brunswick. 

 24,25. Lepiditta alata (Matthew) 94 



24. Cast of interior of right valve, X 20, 



25. Outer surface of left valve, X 20. 



Middle Cambrian (Acadian Clc2): Hanford 

 Brook, New Brunswick. 



26. Lepiditta ? auriculata Matthew (see also pi. 5, fig. 20) 96 



Matthew's figure of a supposed left valve of this 



doubtful species, X 4. 

 Middle Cambrian (Acadian Clc) : Porters Brook, St. 



Martins, New Brunswick. 



27. Lepiditta ? sigillata Matthew (see also pi. 5, fig. 21) 96 



The greatly crushed type specimen, X 4. 

 Lower Cambrian (Hanfordian C1&3) : Hanford Brook, 

 New Brunswick. 



28. Lepiditta ? polita (Steusloff) 96 



The type specimen, a right valve (after Steusloff). 

 Cambrian drift; Neue Brandenburg, Germany. 



29. Lepiditta curta Matthew (see also pi. 5, figs. 18, 19) 95 



Matthew's view of the type specimen, X 10. 

 Middle Cambrian (Acadian, Cldl): Porter's Brook, 

 St. Martins, New Brunswick. 



30. Hipponicharion minus Matthew (see also pi. 2, figs. 14-16) 63 



The type specimen, a right valve, X 6. 

 Lower Cambrian (Hanfordian, C153): Hanford 

 Brook, New Brunswick. 



31. Hipponicharion eos Matthew 62 



Matthew's figure of the large valve, X 4, upon which 



this species is based. 

 Lower Cambrian (Hanfordian, ClBl): Hanford 



Brook, New Brunswick. 



