44 -Appendix. 



Helix elevata, Say, (Dead specimens in recent deposits). 

 Helix exoleta, Binn.,' (Cascade Glen). 

 Helix fallax, Say, (common). 

 Helix hirsuta, Say, (common). 

 Helix labyrinthica, Say, (common). 

 Helix lineata, Say, (not abundant). 

 Helix monodon, Rack., (common). 

 Helix monodon, var. Leaii, (common). 

 Helix monodon, var. Fraterna, (common). 

 Helix multilineata, Say, (common). 

 Helix multilineata, var. albina, (uncommon). 

 Helix palliata, Say, (uncommon). 

 Helix perspectiva, Say, (south and west, uncommon). 

 Helix profunda, Say, (Cascade Glen). 

 Helix pulchella, Mull., (common). 



Helix, solitaria, Say, (Dead). Live specimens found up the 

 River by Dr. A. B. Lyons, Detroit. 



Helix striatella, Anth., (common). 

 Helix thyroides. Say, (common). 

 Helix tridentata, Say, (common). 

 Cionella subcylindrica, Leach, (common). 

 Pupa armifera, Say, (common). 

 Pupa contracta, Say, (common). 

 Pupa pentodon, Say, (South). 

 Pupa fallax, Say, river banks, (rare). 

 Vertigo milium, Gld., (common). 

 Vertigo ovata, Say, (common). 

 Succinea avara, Say, (common). 

 Succinea obliqua, Say, (uncommon). 

 Succinea ovalis, Gld. not Say, (uncommon). 

 Succinea Peoriensis, Wolf, (common). 



FAMILY, Arionida. 

 Zonites arborea, Say, (common). 

 Zonites fuliginosa, Griff., (Cascade Glen). 

 Zonites indentata, Say, (common). 

 Zonites nitida, Mull., (common). 



