To what type of supernovae do old galactic remnants belong; the evolution of envelopes in the interstellar medium

Investigation of the evolution of supernova remnants in the Galaxy medium is carried out. The investigation of the kinematics of old optical Supernova remnants allows to estimate the mean initial energy of the envelopes, E0=(3.7+-1.5)x1050 erg; this gives the mass ejected approximately equal to 0.3 Msub(Sun) for the type 1 (V0=104 km/s), and 1-2 Msub(Sun) for the type 2. Supernovae (V0=(5-7)x103 km/s.) For determining the Supernova type, the physical association of the remnants with gas-and-dust complexes and OB-associations is considered. It is shown that the optical remnants IC443, the Monoceros Loop, the weak envelope of W1, W28, Vela X, and possibly HB3, may have been formed in the type 2 Supernovae explosion; the late stage of the evolution was accompanied by an intense mass loss. The problem of the ''plerions'' evolution is considered. It is suggested that as far as their central sources damp, they turn into classical envelope radio Supernova remnants