DAVIDSON — SCOTTISH Ci\JlBONIFEEOUS BRACHIOPODA, 



267 



15. Orthis resupinata. Variety (?) from Corrie Bum ; collection of Mr. 



Young. 



16. StreptorhyncJiiis crenistria, Phillips. From Corrie Bum. 



17. ■ . Outline of a large specimens from West 



Broadstone. Many examples of Phillips' var. senilis have been re- 

 cently found in the limestone of Boertrapping, three miles south of 

 Glasgow, by Mr. J. Thomson. 



18. . Interior of the ventral valve. 



19. . Interior of the dorsal valve. 



20. . A young specimen from Gare. 



21. ■ . Longitudinal section to show the space left 



collection of Dr. Shmc 



for the animal between the valves. 



A small specimen from Gare. 

 var. Kellii, M'Coy. From Ayrshire, 

 var. radialis, PhiUips. From Middleholm; 



22. 

 23. 

 24. 



25. , From Gare. 



26. Strojpliomena rhomboidalis, var, analoga, Phillips, Corrie Burn ; collec- 



tion of Mr, Young, 



27. • . Interior of ventral valve. 



28. . Interior of ventral valve. A, occlusor ; 



R, divaricator ; P, pedicle (?) ; F, interior opening of foramen, which 

 is closed at X in fig. 27. 



29. . Interior of the dorsal valve. Y, vascular 



impressions. 



30. ■ . A very young example, in which both 



valves are straight. 



31. . A fragment of the ventral valve, showing 



the external orifice of the foramen. 



32 — 33. , vai-. distorta, J. de C. Sowerby. From 



Gare. 



Plate Hi 



. 1. Clionefes Buchiana, de Koninck. From Gare ; la h, enlarged represen- 

 tations. 



2. Hardrensis, Phillips. Nat. size. From East Barns, near 



Dunbar. 



3. . Interior of ventral valve. A, occlusor ; R, diva- 

 ricator ; collection of Mr. Armstrong. 



4. ■ . Interior of dorsal valve. A A, quadruple im- 

 pressions of the occlusor j X, reniform impressions. Capel Rig, East 

 Kilbride. 



5. . A young shell, from Craigie, near Kilmarnock ; 



collection of Mr. Thomson. 



6. ■ . A young shell from Mill Bum ; collection of Mr. 



Young. 



7. , A small variety (?) from South HiU, Campsie ; 



collection of Mr. Young. 



8. Productus latissimus, Sowerby. From near Dairy. 



9. . Interior of the dorsal valve, from Belston Burn. 



(A fig. of the ventral valve will be found, pi. iv., fig. 26). 



10. longispinus, Sow. With its spines restored ; from Lanarkshire. 



11. . From Craigie, near Kilmarnock ; collection of 



Mr. J. Thomson. 



12. . From the original specimen of P. longisjoinus, 



Sow. West Lothian and collection of Dr. Fleming. 



13. 3 var. lohatusy Sow. From Lanarkshire, 



