114 



Figure 19, 20. Nucula Portlandica, Hitchcock. 



Boston Journal Natural History, vol. 1, p. 327. 



Remarks. — Fossil. From the tertiary formation near Portland, Maine. I 

 am indebted to Mrs. S. Dunlap, of Salem, for specimens of this fossil. 



Figure 21. Helix denticulata, Nobis. 



Habitat, unknown. 



Remarks. — This Helix has been in my collection for several years, and I can- 

 not find that it has been described ; nor have I ever seen a duplicate. 



