Abstract: Scacia cotgo-nai is monoecious. The development of its reproductive organs is more or less similar to other species the genus. But the position where the initial gonimoblast cell as formed differs in different species. For example,the initial gonimoblast cells of rS'eirzairx fxrceZduta(Turn) Bivona and cporr.aca yamada et Tanak formed at the carpogonium; that of Setch is farmed at the point where the carpogonium is longitudinally divided and is located side by side with the carpogonium above the hypogynous daughter cell; tb.at of S.cogto-aaii setch is formed on the hypogy- nous daughter cell situated immediate to the carpoganiun.Consideration of tb.e above observed difference in the ontogenetic development of the reproductie organs of different species of ciaught can throw light on their phyio-genetic rela,tiunship.