Mass-selected C, C-2, and C-4 cations were "soft-landed" on cold-deposited Ag films and the SERS spectra of the resulting deposits measured as a function of coverage. Very little amorphous or graphitic carbon formation was observed even at similar to 1 monolayer coverage. A band at 760 cm(-1) observed only for deposited C+ and C-2(+) is assigned to isolated Ag-C moieties. A band at 2010 cm(-1) is ascribed to a cluster or clusters larger than C-3.