PLATE XXXIX. 



Fig. l.— Cypricardella parallela. The type specimen of Phillips's Venus parallela from the Carboniferous Lime- 

 stone of Bolland. In the Gilbertson Collection, Natural History Museum, South Kensington. (Page 348.) 



Pip. 2.— Cypricardella parallela. A full-grown example from the Carboniferous Limestone of Hill Stebden, 

 Yorkshire. Collected by Mr. Garwood. (Page 348.) 



Fig. 3. — Cypricardella parallela. A well-preserved example showing the surface markings more perfectly than 

 Phillips's type. Same locality and collection. (Page 348.) 



Fig. 4. — Cypricardella parallela. A more rhomboidal form. Same locality and collection. (Page 348.) 



Fig. 5. — Ci/pricardella parallela. Same locality and collection. 5 a. Showing hinge-line and escutcheon. (Page 

 348.) 



Fig. 6. — Cypricardella parallela ? A very transverse variety, but with characteristic escutcheon and lunule. Same 

 locality and collection. (Page 348.) 



Fig. 7. — Cypricardella parallela. A medium-sized specimen from the Carboniferous Limestone of Pilsbury, Derby- 

 shire, la. Enlarged view. In the Collection of the Geological Survey, Jermyn Street. (Page 348.) 



Fig. 8. — Cypricardella concentrica. A fine full-grown shell from the Lower Limestone series of Craigen Glen. In 

 the Collection of Mr. J. Neilson, with a view, Fig. 8 a, of the lunule, umbones, and escutcheon. (Page 350.) 



Fig. 9. — Cypricardella concentrica. A specimen showing the hinge of the left valve, from the Lower Limestone 

 series of Law Dairy. 9 a. Enlarged view. In the Collection of Mr. J. Smith. (Page 350.) 



Fig. 10. — Cypricardella concentrica. A right valve from shale below the Lower Limestones, Beith. In the 

 Collection of Mr. J. Smith. (Page 350.) 



Fig. 10 a. — Cypricardella concentrica. The same specimen, enlarged view, showing the hinge. 



Fig. 11. — Cypricardella concentrica. A young example. 11 a. Enlarged view. From shales below the Linn Spout 

 Limestone, Linn Spout, Dairy. My Collection. (Page 350.) 



Fig. 12. — Cypricardella crelricostata. A medium-sized example from shale above the Arden Limestone, Carluke. 

 In the Collection of Mr. J. Smith. (Page 352.) 



Fig. 13.— Cypricardella crelricostata. A full-grown example, showing Fig. 13 a, a view of the umbones, lunule, 

 and escutcheon. Same locality and collection. (Page 352.) 



Fig. 14. — Cypricardella acuticarinata. A left valve from the Upper Limestone series of Orchard. In the Collection 

 of Mr. J. Smith. 14 a. Enlarged view. (Page 359.) 



Fig. 15. — Cypricardella acid tea rinata. The same shell as Fig. 14, showing the hinge-plate of the left valve. 15 a. 

 Enlnrged view. * From the Collection of Mr. J. Smith. (Page 359.) 



Fig. 16. — Cypricardella acuticarinata. A specimen from Orchard. In the Collection of Mr. J. Xeilson. (Page 

 359.) 



Fig. 17. — Cypricardella acuticarinata. Same locality and collection. (Page 359.) 



Fig. IS. — Cypricardella acuticarinata. A full-grown specimen. Same locality and collection. 18 a. Enlarged 

 view. (Page 359.) 



Fig. 19. — Cypricardella acuticarinata. The same specimen viewed from above. 19 a. Enlarged view. (Page 359.) 



Fig. 20. — Cypricardella rectangularis. A specimen from Gallowhill, Strathavon. Same collection. (Page 356.) 



Fig. 21. — Cypricardella rectangularis. A full-grown example. Same locality and collection. (Page 356.) 



Fig. 22. — Cypricardella rectangularis. Showing a rather different ornamentation. Same locality and collection. 

 (Page 356.) 



Fig. 23. — Cypricardella rectangularis. A right valve, showing the hinge-plate, from Williamswood, near Glasgow. 

 In the Collection of Mr. .1. Smith. 23 a. Enlarged view of the same. (Page"356.) 



Fig. 24. — Cypricardella rectangularis. A specimen from Orchard. In the Collection of Mr. J. Neilson. 24 a. 

 Enlarged view. (Page 356.) 



Fig. 25. — Cypricardella rectangularis. Fig. 25 a. Enlarged view showing the large escutcheon and lunule. 

 (Page 356.) 



Fig. 26. — Cypricardella rectangularis. The type of M'Cov's Nucula rectangularis. Preserved in the Griffiths 

 ('..11. ction of the Science and Art Museum, Dublin. "(Page 356.) ' 



Fig. 27. — Ciipricardilla Seli/siana. A right valve from the Lower Limestone series of Law Dairy. In the 

 Collection of Mr. J. Smith. (Page 353.) 



Fig. 28. — Cypricardella Selysiana. A right valve from natural size. The same locality, showing the hinge. 

 Saine collection. 28a. Enlarged view. (Page 353.) 



Fig. 29. — Cypricardella Selysiana. A specimen from the Lower Limestone series of Craigen Glen. In the Collec- 

 tion of .Mr. .1. Neilson. (Page 353.) 



Fig. 30. Cypricardella Selysiana. A right valve. In the Collection of Mr. J. Neilson. Same locality. Nat. size. 

 30 a. Enlarged view. (Page 353.) 



Fig. 31. Cypricardella annse. A right valve from the Poolvash Limestone, Isle of Man. 31a. Enlarged view. 

 Mj Collection. ( Page 355.) 



Fig, 32. — Cypricardella annse. A right valve from the Carboniferous Limestone of Settle. In the Collection of the 

 Woodwardinn Museum, Cambridge. 32a. Enlarged view. (Page 355.) 



1 '-'■ '■'■'■'■ Cypricardt lla anna . A right valve and an enlarged view. Same locality and collection. (Page 355.) 



Fig. 34. — Cypricardella anna . A right valve. Same locality and collection. (Page 355.) 



I - Cyprii ardella anna . A right valve from the Poolvash Limestone, Isle of Man. (Page 355.) 



