THE NAUTILUS, XIX. 



PLATE V11I. 



Figs. 1, 2, 6, 7. Carychium exile canadense. 

 Figs. 8, 9. Carychium exiguum*. 



Figs. 3, 4, 5. Carychium exile. 

 Fig. 10. C. stygium. 



