ORDOVICIAN AND SILURIAN BRACHIOPODA OF THE GIRVAN DISTRICT. 993 



Platb XXI. 



Fig. 1. Gliftonia Andersoni, sp. nov. Complete shell, brachial side. Nat. size. Stinchar Limestone 

 Group, Craighead. G. 



Fig. la. Ditto. Same specimen, pedicle side. Nat. size. ' 

 Fig. lb. Ditto, ditto. Posterior view. Nat. size. 

 Fig. Ic. Ditto, ditto. Anterior view. Nat. size. 

 Fig. Id. Ditto, ditto. Side-view. Nat. size. 



Fig. 2. Ditto. Posterior view of internal cast of brachial valve. x 2. Balclatchie Group, Ardmillan. 

 G. (Figured, Davidson, SuppL, pi. viii, fig. 30, as Triplecia spiriferoides.) 



Fig. 3. Ditto. Side-view of brachial valve. x 1|. Same horizon (conglom.), Balclatchie. G. 

 Fig. 4. Ditto. Posterior view of internal cast of brachial valve. x 2. Same horizon and locality. G. 

 Fig. 5. Ditto 1 var. Brachial valve, x 1J. Stinchar Limestone Group, Craighead. G. (Figured, 

 Davidson, Suppl., pi. x, fig. 21, as Bhynch. nasuta.) 



Fig. 6. Ohonetes advena, sp. nov. Internal cast of pedicle-valve. x 3. Starfish Bed, Drummuck 

 Group, Thraive Glen. G. 



Fig. 7. Ditto, ditto. x 1\. Same horizon and locality. G. 



Fig. 8. Ditto, ditto. x 1\. Same horizon and locality. G. 



Fig. 9. Ditto. Brachial valve. x 2£. Same horizon and locality. G. 



Fig. 10. Ditto. Impression of same valve. x 2\. Same horizon and locality. G. 



Internal cast of brachial valve. x 2|. Same horizon and locality. G. 

 Clitambonites ascendens, Pander. Internal cast of pedicle-valve (broken near beak to show 

 Starfish Bed, Drummuck Group, Thraive Glen. G. 

 Impression of exterior of pedicle-valve. x 1|. Same horizon and locality. G. 

 Impression of exterior of brachial valve of same shell. X 1 J. 

 Outline side-view of internal cast of complete shell, x 1|. Same horizon and 



Internal cast of pedicle- valve. xl|. Same horizon and locality. G. 

 Pedicle-valve (from squeeze of external impression of same shell as fig. 16). x 1£. 

 Same horizon and locality. G. 



Fig. 18. Ditto. Internal cast of brachial valve, x 1^. Same horizon and locality. G. 



Fig. 19. Clitambonites complectens (Wiman), var. nov. albida. Pedicle-valve. x 3. Whitehouse 

 Group, Shalloch Mill. G. 



Fig. 19a. Ditto. Side-view of same specimen, x 3. 



Fig. 20. Ditto. Pedicle-valve. x 2. Same horizon and locality. [4202.] M.P.G. 



Fig. 20a. Ditto. Outline side-view of same specimen. x 2. 



Fig. 21. Clitambonites shallochensis (Dav.). Pedicle- valve of complete specimen, x 2. Whitehouse 

 Group, Shalloch Mill. G. (Figured, Davidson, SuppL, pi. xi, fig. 6.) 



Fig. 21a. Ditto. Brachial valve of same shell, x 2. 



Fig. 22. Ditto. Pedicle-valve. x 3. Same horizon and locality. G. 



Fig. 22a. Ditto. Side-view of same specimen, x 3. 



Fig. 23. Ditto. Pedicle-valve. x 1£. Same horizon and locality. G. 



Fig. 23a. Ditto. Posterior view of same specimen, x 1£. 



Fig. 236. Ditto. Outline side-view of same. x 1|. 



Fig. 24. Hemipronites carrickensis, sp. nov. Pedicle-valve, x l\. Stinchar Limestone Group, Craig- 

 head. G. 



Fig. 25. Ditto. Brachial valve. x 2. Same horizon and locality. G. 



Fig. 26. Ditto. Side-view of pedicle-valve, x 1|. Same horizon and locality. G. 



Fig. 27. Hemipronites Thomsoni, sp. nov. Complete shell, pedicle side, x 1^. Stinchar Limestone 

 Group, Craighead. G. 



Fig. 27a. Ditto. Same specimen, brachial side. x l\. 



Fig. '27b. Ditto. Outline side-view of same specimen. x l\. 



Fig. 11. 



Ditto. 



Fig. 12. 



Clitam 



spondylium). 



xll 



Fig. 13. 



Ditto. 



Fig. 14. 



Ditto. 



Fig. 15. 



Ditto. 



locality. G. 





Fig. 16. 



Ditto. 



Fig. 17. 



Ditto. 



