PLATE 49. 
Figs. 1-4. Meristella meta. 
1-4. Dorsal, ventral, profile and front views of a specimen of the ordinary size. 
Page 
308 
Figs. 5-22. Meristella barrisi. 304 
5 Dorsal view of a small individual. 
6, 7. Dorsal and profile views of a very gibbous form. 
8, 9, 11. 12. Dorsal views of specimens illustrating the prevailing size and forms of the species. 
10. A ventral view of the specimen, fig. 9. 
13-15. Dorsal, profile and front views of an unusually elongated and gibbous form. 
16 - 19. Dorsal, ventral, profile and front views of large forms, the front view offering a Strong 
contrast with fig. 15. 
20. A ventral view of a broad form of the species. 
21, 22. Dorsal and ventral views of casts of this species. 
Figs. 23-35.* Meristella haskinsi. 306 
23-25. Dorsal, profile and front views of a small lenticular form which shows little gibbosity. 
27, 26, 30. Profile, dorsal and front views of a more gibbous form. 
28, 31. Dorsal and ventral views of a larger form, showing a greater extension of beak. 
29, 32, 33. Profile, dorsal, and ventral views of a specimen of the ordinary size and form. 
34. Dorsal view of a large individual, showing the foramen and deltidial plates. 
35. Cast of a ventral valve. 
36. A dorsal view of a partial cast. The specimen is referred with doubt to this species. 
