Optical spectra and redshifts for seventy-one galaxies.

Spectra of 71 galaxies, including 30 Indus galaxies, have been obtained with an image tube spectrograph at Cassegrain focus of the 1.9-m telescope of the South African Astronomical Observatory at a reciprocal dispersion of 215 A/mm. Complete lists of absorption features and emission lines have been compiled, and redshifts have been derived with external mean errors of the order of plus or minus 60 km/s. The results support Sandage's (1975) findings of systematic differences between H I radio and optical redshifts; some redshift values tend to support suggestions of the cell structure of the Coma Supercluster