The authors report the experimental results of a Raman scattering study of magnons in the layered triangular-lattice Heisenberg antiferromagnet VCl2. The magnetic phase transition of this compound is said to reflect the mechanism of the dissociation of the Z2 vortex proposed by Kawamura and Miyashita (1984). As well as two phonon lines, which agree with a group theoretical analysis, three lines are detected at low temperatures; however, they disappear around TN=36 K. Two lines among these three are attributed to the two-magnon process on the assumption that the Neel state forms a three-sublattice structure, i.e. a 120 degrees spin structure in the ac plane. The rapid decrease of their intensity above TN is unusual; this phenomenon, the authors believe, should be understood on the basis of the generation of Z2 vortices. However, the origin of the other line is hard to explain using conventional spin-wave theory.