Spectroscopy of Luminous Infrared Galaxies at 2 Microns. II. Data for Galaxies with 11.2 ≤ log ( <i>L</i> _IR / <i>L</i> _☉ ) ≤ 11.9

Spectra across the infrared K band are presented for a flux-limited sample of powerful, bright, "infrared" galaxies. The sample in the present paper, consisting of 43 systems (47 individual galaxies) with infrared luminosities LIR in the range 11.2 ≲ log (LIR/L☉) ≲ 11.9, was chosen from the IRAS Bright Galaxy Catalogue. The spectra have resolving powers of ~340-680. When combined with the 13 spectra we have already published for the "ultraluminous" galaxies, those with log (LIR/L☉) ≳ 12.0, this constitutes the largest database of high-quality infrared spectra yet assembled for a well-defined sample of galaxies.