代数K3曲面についての注意

　In this note the author analyzes candidates for a moduli space of algebraic K3-surfaces which have apppeared in literatures. In §１,Griffith's period matrices and Sapiro-Safarevic's space are treated. It is revealed in §2 that the complex analytic family of all non-singular surfaces of degree four in the complex projective three space is a local moduli space for algebraic K3-surfaces.