The Collaborative International Dictionary of English v.0.48:

Shelly \Shell"y\, a.
   Abounding with shells; consisting of shells, or of a shell.
   "The shelly shore." --Prior.
   [1913 Webster]

         Shrinks backward in his shelly cave.     --Shak.
   [1913 Webster]

U.S. Gazetteer Places (2000):

Shelly, MN -- U.S. city in Minnesota
   Population (2000):    266
   Housing Units (2000): 122
   Land area (2000):     0.209259 sq. miles (0.541979 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.209259 sq. miles (0.541979 sq. km)
   FIPS code:            59566
   Located within:       Minnesota (MN), FIPS 27
   Location:             47.457995 N, 96.819250 W
   ZIP Codes (1990):     56581
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Shelly, MN
    Shelly