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The resistivity and Hall effect in CeNiSn are measured at temperatures downto 35 mK and in magnetic fields up to 20 T with the current applied along the{\it b} axis. The resistivity at zero field exhibits quadratic temperaturedependence below $\sim$0.16 K with a huge coefficient of the $T^2$ term (54$\mu$$\Omega$cm/K$^2$). The resistivity as a function of field shows ananomalous maximum and dip, the positions of which vary with field directions.Shubnikov-de Haas (SdH) oscillations with a frequency {\it F} of $\sim$100 Tare observed for a wide range of field directions in the {\it ac} and {\it bc}planes, and the quasiparticle mass is determined to be $\sim$10-20 {\it m}$_e$.The carrier density is estimated to be $\sim10^{-3}$ electron/Ce. In a narrowrange of field directions in the {\it ac} plane, where themagnetoresistance-dip anomaly manifests itself clearer than in other fielddirections, a higher-frequency ($F=300\sim400\text{T}$) SdH oscillation isfound at high fields above the anomaly. This observation is discussed in termsof possible field-induced changes in the electronic structure.Comment: 15 pages, 5 figures, to appear in Phys. Rev. B (15 Sept. 2002 issue

Resistivity, Hall effect, and Shubnikov–de Haas oscillations in CeNiSn