PLATE 52 



Cyrtina dalmani (Hall) 

 Page 201. 



Figs. 1, 3. Ventral, dorsal, and posterior views. 

 Fig. 4. Central view of a portion of a shell. 



Rhynchospira formosa Hall 

 Page 201. . 



Figs. 5-7. Ventral, dorsal, and side views. 



Figs. 8-11. Ventral and dorsal views of two specimens. 



Figs. 12-14. Ventral, dorsal, and side views. 



Fig. 15. Side view. 



Fig. 16. Anterior view of a perfect individual. 



Fig. 17. Ventral view of a variety. 



Fig. 18. Dorsal view. 



Trematospira equistriata Hall and Clarke 

 Page 201. 



Figs. 19, 20. Ventral and posterior views of the one specimen. 



Nacleospira ventricosa Hall 

 Page 202. 

 Fig. 21. Ventral view. 

 Fig. 22. Ventral view. 

 Figs. 23, 24. Ventral and anterior views. 

 Figs. 25, 26. Dorsal and anterior views. 

 Figs. 27-30. Anterior, dorsal, ventral, and side views. 

 Figs. 31-33. Dorsal, ventral, and posterior views. 



Meristella laevis (Vanuxem) 

 Page 202. 



Figs. 34-36. Ventral, dorsal, and side views. 



Figs. 37-44. Ventral, dorsal, side, and anterior views of two specimens. 



