[en] Gamma-ray emission is produced in many localized regions. 13 high energy gamma-ray sources have previously been detected but because of difficulties of identification the nature of these sources is not clear. Further data from COS-B has been accumulated and allow a more systematic search for gamma-ray sources in the Galaxy. The 32 observations used were made between August 1975 and December 1978. Only events above 100 MeV have been included. The positions of the 25 detected gamma-ray sources are given. Only four sources of the catalogue have been identified, two with the Crab and Vela pulsars, one with 3C273 and one with the rho-Oph cloud complex. For the remainder, all but one of which lie close to the galactic disc, no unambiguous counterparts appear to exist at other wavelengths. (U.K.)