990 DR F. R. C. REED ON THE 



Plate XVII. 



Fig. 1. Stropheodohta Jamesoni, sp. nov. Pedicle-valve. x 1£. Saugh Hill Group, Woodland 

 Point. G. 



Fig. 2. Ditto. Portion of surface of shell. x 3. Same horizon and locality. G. 



Fig. 3. Stropheodonta (Brachyprion) Wahnstedti (Lindstr.). Cardinal region of pedicle-valve, x 2. 

 Camregan Group, Cuddystone Glen. G. 



Fig. 4. Stropheodonta (Leptostrophia) filosa (Sow.), var. nov. mulloehensis. Pedicle-valve (most 

 of shell missing). X \\. Mulloch Hill Group, Mulloch Hill. G. 



Fig. 4a. Ditto. Portion of surface of same specimen. x 4. 



Fig. 5. Ditto. Internal cast of pedicle-valve. x 2. Same horizon and locality. G. 



Fig. 6. Ditto. Brachial valve. x 2£. Same horizon and locality. G. 



Fig. 7. Ditto, ditto (left half). x 2£. Same horizon and locality. G. 



Fig. 8. Ditto. Internal cast of brachial valve, x 1|. Same horizon, Craigens. G. 



Fig. 8a. Ditto. Cardinal region of same specimen. x 3. 



Fig. 9. Stropheodonta (Leptostrophia) subfilosa, sp. nov. Pedicle-valve. x 1|. Stinchar Limestone 

 Group, Craighead. G. 



Fig. 10. Ditto. Brachial valve. xl|. Same horizon and locality. G. 



Fig. 11. Ditto. Cardinal areas of complete shell. x2|. Same horizon and locality. G. 



Fig. 12. Ditto. Left half of pedicle-valve. x 3. Same horizon and locality. [2929.] E. 



Fig. 13. Stropheodonta (Brachyprion) columbana, sp. nov. Pedicle-valve. xl|. Mulloch Hill Group, 

 Mulloch Hill. G. 



Fig. 14. Ditto. Internal casts of both valves. x 1|. Same horizon, Plough Neuk. G. 



Fig. 15. Ditto. Brachial valve (from squeeze). x 1J. Same horizon, Mulloch Hill. G. 



Fig. 16. Ditto. Pedicle- valve (from squeeze). xl|. Same horizon and locality. G. 



Fig. 17. Ditto. Internal cast of pedicle-valve (median part.). x 2. Same horizon, Craigens. G. 



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



Fig. 19. Ditto, ditto. x 2. Same horizon, East Threave Farm. B.M. 



Fig. 19a. Ditto. Cardinal region of same specimen. x 3. 



Fig. 20. Stropheodonta (Brachyprion) sp. Internal cast of pedicle-valve. x 1£. Camregan Group, 

 Camregan Wood. G. 



Fig. 20a. Ditto. Cardinal region of same specimen. x 3. 



Fig. 21. Stropheodonta 1 Nicholson/, sp. nov. Internal cast of pedicle-valve. xlj. Balclatchie 

 Group, Balclatchie. G. 



Plate XVIII. 



Fig. 1. Stropheodonta 1 Nicholsoni, sp. ■ nov. Impression of exterior of brachial valve. x 1|. 

 Balclatchie Group, Balclatchie. G. 



Fig. 2. Ditto. Impression of exterior of pedicle-valve of same shell. xl|, G. 



Fig. 3. Ditto. Impression of exterior of brachial valve. x \\. Same horizon and locality. G. 



Fig. 4. Ditto. Internal cast of same brachial valve, x 1^. G. 



Fig. 5. Ditto. Impression of exterior of brachial valve. xl|. Same horizon and locality. G. 



Fig. 6. Ditto. Internal cast of pedicle-valve. x 2. Same horizon and locality. G. 



Fig. 7. Ditto. Internal cast of small brachial valve. xl|, Same horizon and locality. G. 



Fig. 8. Ditto. Complete shell, pedicle-valve. x l^. Same horizon (conglom.) and locality. G. 

 (Figured, Davidson, SuppJ., pi. xv, fig. 10.) 



Fig. 8a. Ditto. Same specimen, brachial valve. x 1A. 



Fig. 81. Ditto. Median longitudinal section of same specimen. x 1A 



Fig. 9. Stropheodonta sp. Pedicle-valve (broken), (from squeeze). xl|. Mulloch Hill Group, 

 Mulloch Hill. G. 



Fig. 10. Ditto. Internal cast of broken pedicle-valve. xl|. Same horizon and locality. G. 



Fig. 11. Strophonella pmkillensis, sp. nov. Internal cast of brachial valve. x 1|. Camregan Group, 

 Bargany Pond Burn. G. 



i 



