There are several granitic bodies of two defferent genetic types occurreo in Donghai, Nanjing-Zhenjiang as well as Suzhou areas, Jiangsu Province. At the marginal and topmost parts of these bodies there are plenty of greyish black to dark green inclusions with very irregular shapes and disparate sizes throughout the whole rock mass. Inasmuch as they contain more mafic minerals than the relevant host rocks, they usually show darker. But the mineral assemblage, petrochemical and geochemical characteristics of them are very close to these of the hosts, thus they were considered as comagmatic derivatives. The mineral grain sizes in the inclusions are usually much smaller than those in the hosts. They also carry numerous acicular crystals of apatites(L/W>20) which were thought to be the precipetates under the quenching condition. Bes ides these, they also show some corrosion phenomena. Based upon the facts me ntioned above, these kinds of inclusion could attributes neither to xenoliths of early formed magmatic rocks or sedimentary rocks, nor to sehlireus or deep mantle source inclusions. This is possible of ascribing them to autoclastic inclu sions formed originally as a marginal facies enriched mafite and later on frag- mented and corroded by the successive magmatic pulsation.