From IAUC 6785: GRB 971208 V. Connaughton, National Academy of Sciences/National Research Council and Marshall Space Flight Center (MSFC); and R. M. Kippen and R. Preece, University Alabama at Huntsville and MSFC, for the BATSE team; and K. Hurley, University of California at Berkeley, for the Ulysses team, write that an unusually long and smooth single-peaked gamma-ray burst (GRB) was detected by BATSE on the Compton Gamma-Ray Observatory on Dec. 8.335 UT (trigger 6526) and was detected also by Ulysses. A duration of nearly 800 s makes it longer by an order of magnitude than any other single-peaked GRB observed by BATSE. It is also the longest single episode of emission in a BATSE GRB. Its intensity rose over an interval of 60 s to a maximum flux of 8.97 +/- 0.3 x 10E-7 erg cmE-2 sE-1 (between 25 and 1800 keV; integration time 2.048 s) and decayed with a power law of roughly -0.4 over the following 700 s. The total fluence of the event above 25 keV is estimated to be 1.86 +/- 0.03 x 10E-4 erg cmE-2. The BATSE location centroid for the GRB is R.A. = 23h45m50s, Decl. = +77o56'.4 (equinox 2000.0) with a 1-sigma statistical error of 1.2 deg. A preliminary joint BATSE/Ulysses InterPlanetary Network annulus is described by a center at R.A. = 23h25m39s, Decl. = -11o52'.4, with a radius of 87.906 deg (half-width 0.224 deg). A sky map of the event is available at http://www.batse.msfc.nasa.gov/~kippen/batserbr/brbr_obs.html. -eof-