996 DK F. R. C. PEED ON THE 



Fig. 4. Ditto. Striated inner surface of shell. x 2. Same horizon and locality. 



Fig. 5. StricMandinia mullochensin, sp. now Internal cast of brachial valve. Nat. size. Mulloch 

 Hill Group, Mulloch Hill. G. 



Fig. 6. Ditto. Brachial valve. x 1L Same horizon and locality. G.' 



Fig. 7. Ditto. Pedicle-valve. x 1L Same horizon and locality. G. 



Fig. 8. Ditto. Internal cast of imperfect 'brachial valve, xlj. Same horizon and locality. G. 



Fig. 9. Pentamerus (BarrandeUa) undatus (Sow.), var. nov. penkillensis. Internal cast of pedicle- 

 valve, x 1L Penkill Group, Penwhapple Glen. G. - 



Fig. 10. Ditto. Anterior view of pedicle-valve. x 1£. Camregan Group, Bargany Pond Bum. G. 



Fig. 10a. Ditto. Outline side-view of same specimen, x 1J. 



Fig. 11. Ditto. Anterior view of pedicle-valve. x 1£. Same horizon and locality. G. 



Fig. 12. Ditto. Internal cist of pedicle-valve (sinus nearly obsolete). x 1|. Same horizon and 

 locality. G. 



Fig. 13. Ditto? Internal cast of brachial valve. xlj. Same horizon and locality. G. 



Fig. 14. Metacamarella balclatchiensis (Dav.). Internal cast of pedicle-valve. x 1|. Balclatchie 

 Group (conglom.), Balclatchie. G. (Figured, Davidson, Suppl., pi. ix, fig. 27.) 

 C.h.Q t+6ot~7, P'g- 15- Ditto. Brachial valve. x 1|. Same horizon and locality. G. (Figured, ibid., pi. ix, fig. 28.) 



Fig. 16. Ditto. Front view of beak of pedicle-valve. xl{. Same horizon and locality. G. (Figured, 

 ibid., pi. ix, fig. 29.) 



Fig. 16a. Ditto. Side-view of same specimen. x 1^. 



Fig. 17. Ditto. Brachial valve. x 1-k Same horizon and locality. G. 

 " Fig. 17a. Ditto. Side-view of same specimen. x 14_. 



Fig. 18. Ditto. Internal cast of brachial valve. xl|. Same horizon and locality. G. 



Fig. 19. Eichwaldia personalis, sp. nov. Complete shell, brachial side. x 1^. Saugh Hill Group, 

 Woodland Point. S.M. 



Fig. 19a. Ditto. Same specimen, pedicle side. xlj. 



Fig. 19fr. Ditto. Same specimen, side-view. x 1^. 



Fig. 19c. Ditto. Portion of shell. x 10. 



Fig. 20. Protorhyncha nasuta (M'Coy). Complete shell, pedicle-valve. Nat. size. Stinchar Limestone 

 Group, Craighead. [445.] S.M. (Figured, M'Coy, Syn. Pal. Foss. pi. i l, fig. 5.) 



Fig. 20a. Ditto. Same specimen, brachial valve. Nat. size. 



Fig. 20b. Ditto. Same specimen, side-view. Nat. size. 



Fig. 20c. Ditto. Same specimen, anterior view. Nat. size. 



Fig. 21. Ditto. Pedicle-valve. x 1|. Same horizon and locality. G. 



Fig. 21a. Ditto. Same specimen, beak and delthyrium. x 1^. 



Fig. 22. Ditto. Pedicle-valve. x 1^. Same horizon and locality. G. 



Fig. 23. Ditto 1 Brachial valve of complete shell. x li. Same horizon and locality. G. 



Fig. 24. Protorhyncha sp. Brachial valve. x 1|. Same horizon and locality. G. 



Fig. 25. Ditto. Pedicle-valve. xl|. Same horizon and locality. G. 



Fig. 26. Orthorhynchula sub-borealis (Dav.). Complete shell, brachial side. x 1£. Stinchar 

 Limestone Group, Craighead. G. (Figured, Davidson, Suppl., pi. x, fig. 5.) 



Fig. 26a. Ditto. Same specimen, pedicle side. x lj. 



Fig. 26/;. Ditto. Same specimen, side-view. x 1J. 



Fig. 27. Ditto. Complete shell, brachial side. x \h Same horizon and locality. G. (Figured, 

 Davidson, Suppl., pi. x, fig. 6.) 



Fig. 28. Rhynchotrema Lapivorthi (Dav.). Complete shell, brachial side. x 1£. Stinchai 

 Limestone Group, Craighead. G. (Figured, Davidson, Suppl., pi. x, fig. 7.) 



Fig. 28a. Ditto. Same specimen, anterior view. x 1|. 



Fig. 29. Ditto. Brachial valve. x 1|. Same horizon and locality. G. 



Fig. 30. Ditto. Complete shell, pedicle-valve. X 1^. Same horizon and locality. G. 



Fig. 31. Ditto, ditto. x 11. Same horizon and locality. G. 





