We have carried out a survey toward the central regions of 85 starless cores in HCN(J=1-0) to study inward motions in the cores. Sixty-four cores were detected with HCN lines. The infall asymmetry in the HCN spectra is found to be more prevalent, and more prominent than in any other previously used infall tracers such as CS(J=2-1), DCO^+^(J=2-1), and N2H^+^(J=1-0). We have found a close relation between the intensities of the HCN and N2H^+^ lines.

Cone search capability for table J/ApJ/664/928/table1 (The line parameters of the starless cores observed in HCN and H^13^CN J=1-0 lines)