GASTEROPOD FAUNA IN THE MILLSTONE GRIT OF SCOTLAND. 359 



EXPLANATION OF PLATES. 



Plate I. 



Fig. 1. Paleeolima retifera, Shumard, sp. x 3/2. Page 337. 



Figs. 2, 3. Aviculopecten regularis, sp. nov. x 3/2. Page 341. 



Figs. 4-6. Aviculopecten neglectus, Geinitz, sp. x 2. Page 341. 



Fig. 7. „ „ „ 4. Page 341. 



Fig. 8. Aviculopecten obliquus, sp. nov. x 2. Page 340. 



Figs. 9, 10. Limatulina alternata, M'Coy, sp. Page 338. 



Figs. 11, 12. Aviculopecten Whitei, Meek, right and left valves. Page 338. 



Fig. 13. „ „ x 3/2. Page 338. 



Fig. 14*. Aviculopecten carboniferus, Stevens, sp. x 3/2. Page 339. 



Fig. 15. Posidoniella leevis, Brown, sp., a left valve, x 3. Page 342. 



Fig. 16. Myalina Verneuillii, M'Coy, sp. Page 342. 



Fig. 17. Nuculana Ixvistriata, Meek and Worthen, sp. x 3/2. Page 343. 



Figs. 18, 19. Nucula gibbosa, Flem. x 4 Page 343. 



Fig. 20. Modiola subelliptica, Meek. x 3. Page 343. 



Fig. 21. Grammatodon tenuistriata, Meek and Worthen, sp. x 21. Page 344. 



Figs. 22, 23. Protoschizodus curtus, Meek and "Worthen, sp. x 3/2. Page 345. 



Figs. 25-28. Schizodus Wheeleri, Swallow, sp. Page 345. 



Figs. 29, 30. 1 Anthracomya truncata, sp. nov. Page 346. 



All specimens are from Scotland, and in the Museum of the Geological Survey of Scotland, with the 

 exception of *. This specimen is from Pately Bridge, Yorkshire, and is in the Collection of the Geological 

 Survey, Jermyn St. 



Plate II. 



Figs. 31, 32. Edmondia excentrica, sp. nov. Page 347. 



Figs. 33. ,, sulcata, Phillips, sp. Page 348. 



Fig. 34. „ nebrascensis, Geinitz, sp. Page 358. 



Fig. 35. „ Lyelli, Hind. Page 348. 



Figs. 36-38. Sanguinolites occidentalism Meek and Hayden, sp. Page 348. 



Fig. 39. 1 Allorisma reflexa, Meek. Page 349. 



Figs. 40-42. Tellinomorplia Hindii, Bolton, x 3/2. Page 349. 



Figs. 43, 44. Solenomorplia cylindrica, sp. nov. x 3. • Page 350. 



F'ig. 45-47. Solenomya brevis, sp. nov. Figs. 45 and 47 x 2. Page 351. 



Figs. 48-50. Prothyris elegans, Meek. x 3/2. Page 353. 



Fig. 51. Loxonema nanum, de Koninck. x 3. Page 353. 



Figs. 52, 53. Naticopsis brevispira, de Ryckholt, sp. x 3. Page 354. 



Fig. 54. Enialis MeeJcianum, Geinitz, sp. x 3/2. Page 355. 



Fig. 55. Ptychomphalus Marcouianus, Geinitz. sp. x 2. Page 354. 



Fig. 56. Bellerophon Marcouianus, Geinitz. x 3/2. Page 356. 



Figs. 57, 58. Euphemus d'Orbignyi, Portlock, sp. x 3/2. Page 355. 



Fig. 59. Macrocheilina, sp. Page 354. 



Figs. 60, 61. Solenomya cylindrica, sp. nov. Page 351. 



AU the figured specimens are from Scotland, and are in the Museum of the Geological Survey of Scotland. 



TRANS. ROY. SOC. EDIN., VOL. XLVI. PART II. (NO. 15). 55 



