We study the low temperature properties of two-dimensional ideal gases
of generalized statistics in a uniform magnetic field. The generalize
d statistics considered here are the parafermion statistics and the ex
clusion statistics. Similarity in the behaviors of the parafermion gas
of finite order p and the gas with exclusion coefficient g = 1/p at V
ery low temperatures is noted. These two systems become exactly equiva
lent at T = 0. Quantum Hall effect with these particles as charge carr
iers is briefly discussed.