Proc.Ac.Nat.Sc.Fhila.187J 



Plate TM 



IW^ 



& 



W.G.B.del. 



' llil Pl-fla 



1. Helix WiedXleyi, J}law?. 5. Helix Mitchelliana^^. 9. Helix asteriscus,>&0ra 



2.HeIixthyroides..*%K 6.,Helix pulchella, J^//. 10. Helix otistricta,^. 



3. Helix Pennsylvanica^/^. 7. Helix labyrinthica, Say. 11. Helix Hubbardi^.i?.^ 



4. Helix loricata, & 8. Helix Townsendiana,/^. 



