ORDOVICIAN AND SILURIAN BRACHIOPODA OF THE GIRVAN DISTRICT. 975 



Plate II. 



Fig. 1. Rhinobolusl balclatclriensis, sp. nov. Internal cast of brachial valve. x 1\. Balclatchie 

 Group, Balclatchie. G. 



Fig. 2. Ditto. Brachial valve. x 2. Same locality and horizon. G. 



Fig. 3. Lingula amabilis, sp. nov. Pedicle-valve. x 2J. Balclatchie Group, Ardmillan. G. 



Fig. 4. Ditto, ditto. x 2. Same horizon and locality. G. (Figured, Davidson, Suppl., pi. xvii, 

 fig. 13.) 



Fig. 5. Ditto. Brachial valve, showing partly internal cast. x 3. Balclatchie Group, Balclatchie. G. 



Fig. 6. Ditto. Pedicle-valve. x 3. Same horizon and locality. G. 



Fig. 7. Ditto. Internal cast of pedicle- valve, with portion of shell attached. x 4. Same horizon 

 and locality. [13155.] M.P.G. 



Fig. 8. Ditto 1 ? Pedicle-valve. x 3. Same horizon and locality. G. 



Fig. 9. Lingula brevis, Portl., var. nov. angustior. Pedicle-valve. x 4. Balclatchie Group, 

 Balclatchie. G. 



Fig. 10. Ditto, ditto. x 4. Same horizon and locality. G. 



Fig. 11. Lingula brevis, Portl., var. nov. carrickensis. Pedicle-valve. x 4. Whitehouse Group, 

 Whitehouse Bay. G. 



Fig. 12. Ditto, ditto. x 5. Same horizon and locality. G. 



Fig. 13. Ditto. Brachial valve. x 5. Same horizon and locality. G. 



Fig. 14. Lingula 1 crumenoides, sp. nov. Pedicle-valve. x 1£. Ballantrae Group, Uennane Head. 

 [Reg. No. 174.] E. 



Fig. 14a. Ditto. Outline side-view of same specimen. x 1|. 



Fig. 15. Lingula mediostriata, sp. nov. Pedicle-valve. x 3. Drummuck Group, Thraive Glen. G. 



Fig. 15a. Ditto. Portion of surface of same specimen. x 8. 



Fig. 16. Ditto, ditto. Internal cast. x 2£. Starfish Bed, Drummuck Group, Thraive Glen. G. 



Fig. 17. Lingula pseudoqua •! 'rata, sp. nov. Pedicle-valve. x 5. Balclatchie Group, Dow Hill. G. 



Fig. 18. Ditto, ditto. x 5. Same horizon and locality. G. 



Fig. 19. Lingula solvens, sp. nov. x 1|. Drummuck Group (Starfish Bed), Thraive Glen. G. 



Fig. 19a. Ditto. Portion of surface of same specimen. x 6. • 



Fig. 20. Lingtdasmal ardmillanense, sp. nov. Internal cast of pedicle-valve. x 2£. Balclatchie 

 Group, Ardmillan. G. 



Fig. 21. Ditto. Internal cast of brachial valve. x 2£. Same horizon and locality. G. 



Fig. 22. Ditto. Interior of shell of same specimen. x 2\. 



Fig. 23. Ditto. Portion of surface of shell, x 8. Same horizon and locality. G. 



Fig. 24. Lingulasmal canadense (Billings). x lj. Balclatchie Group, Balclatchie. G. (Figured 

 Davidson, Suppl., pi. xvii, fig. 1.) 



Fig. 24a. Ditto. Portion of surface of same specimen, x 10. 



Fig. 25. Lingulasma 1 penultimum, sp. nov. Pedicle-valve, x 3. Drummuck Group (Starfish Bed), 

 Thraive Glen. G. 



Fig. 26. Ditto. Portion of shell showing lamination and striation of interior. x 8. Same horizon 

 and locality. G. 



Fig. 26a. Ditto. Portion of external surface of shell of same specimen, showing granulation. x 15. 



Fig. 27. Lingulasmal pulcherrimum, sp. nov. Brachial valve. x 2. Balclatchie Group, 

 Ardmillan. G. 



Fig. 27a. Ditto. Portion of external surface of same shell, showing ornamentation. x 15. 



Fig. 28. Impression of surface of another specimen (figured PI. Ill, fig. 1) showing ornamentation. 

 x 15. Same horizon and locality. G. 



