PLATE IX. 



Page. 

 Plicatula URTicosA Morton 61 



Fig. I. View of a specimen from Freehold, N. J. 



2. View of n different individnal, showing considerable variation in surface characters 

 from the last. 



Radula pelagica Morton 61 



Fig. 3. View of the right side of a specimen preserving a portion of the shell, and show- 

 ing ani^nlar plications; from Holmdel, N. J. 



4. View of a snialler shell, entire, with ronuded plications, from the limestone nodnles 



at Holmdel, N. J. 



5. Posterior view of a speci nen from Holmdel, showing the curvature of the shell. 

 Radula acttilixeata Conrad 6*2 



Fig. (). Enlarged view of a shell from Haddontield, N". J., shov»ing the narrow radii. 

 7. Enlargement of the surface of the same. 



Radula reticulata Lyell and Forbes 6'^ 



Fig. 8. A view, enlarged to two <liameters, of a shell from Upper Freehold, N. J. 

 9. Profile view of the same, showing its convexity. 



Paraxomia lixeata Conrad 45 



Fig. I't. View of an up[»er valve of this species, imperfect at the upper edge. 



Spoxdylus gregalis Morton 57 



Figs. 11 and 12. Views of a v«'ry fair lower valve of large size, showing the features very 

 perfectly. The shell shows a perforation made by some boring mollusk during 

 life. 



286 



