  Graf {\it et al.} [Phys. Rev. Lett. {\bf 93} 076406 (2004)] recently
attributed features in the magnetic-field-dependent longitudinal resistance of
(Per)$_2$Pt(mnt)$_2$ to a cascade of field-induced charge-density waves
(FICDWs). Here we show that a quantitative magnetotransport analysis reveals
orbital quantization to be absent, disproving the presence of FICDWs. Our data
show that the conduction is instead dominated by the sliding CDW collective
mode at low temperatures.
