The worm / David H. Keller -- Mimic / Donald A. Wollheim -- It / Theodore Sturgeon -- Beauty and the beast / Henry Kuttner -- Some are born cats / Terry and Carol Carr -- Full sun / Brian W. Aldiss -- The silent colony / Robert Silverberg -- The street that wasn't there / Clifford D. Simak and Carl Jacobi -- Dear devil / Eric Frank Russell.