  To examine the relationship between black hole mass and host galaxy velocity
dispersion for low black hole masses, we have measured the velocity dispersions
of 15 Seyfert 1 galaxies from the catalog of Greene & Ho (2004). These Seyferts
were selected from the Sloan Digital Sky Survey to have estimated black hole
masses below 10^6 solar masses. The data are consistent with a straightforward
downward extrapolation of the local M-sigma relation, indicating that this
correlation extends over a range of more than four orders of magnitude in black
hole mass. The rms scatter of the sample about the extrapolated M-sigma
relation is 0.57 dex, consistent with the expected scatter of single-epoch mass
estimates for Seyfert 1 galaxies.
