THE NAUTILUS, XXVII. 



PLATE IV 



1-5. PILSBRY: CLAUSILIA EMhRSONIANA. 

 6-8. CLAPP: GUNDLACHIA HJALMARSONI PFR. 

 9, 10. HENDERSON AND CLAPP: CERION BIMINIENSE. 

 11. PILSBRY: PARTULA EMERSONI. 



