The Magazine of Fantasy and Science Fiction: September 1968 (Volume 35, Number 3)
Cover by Chesley Bonestell ("Trifid Nebula.")

Serial: "Sos the Rope" (conclusion) by Piers Anthony (had 2 sequels.)

Novelet: "Ogre!" by Ed Jesby

Stories: "Butterfly Was 15" by Gilbert Thomas
"Harry's Golden Years" by Gahan Wilson
"The Evaporation of Jugby" by Stephen Barr
"A Scare in Time" by David R. Bunch
"The Moving Finger Types" by Henry Slesar.

Science: "The Dying Lizards" by Isaac Asimov.