Contents

16 May 1975
Vol 188, Issue 4189

About The Cover

Midnight encounter? The photograph, taken at night on sandy terrain near Lake Placid, Florida, shows the typical parallel tracks of the milliped Narceus gordanus, with a conspicuous bend where the animal changed direction after having met and presumably repelled the attack of a small vertebrate whose tracks are also visible. Millipeds are protected by noxious secretions from their defensive glands. A novel nitrogen-containing terpene has been isolated from the glands of one species. See page 734. [Thomas Eisner, Cornell University, Ithaca, New York]