The accumulation of C14-serotonin in the guinea-pig vas deferens.

Impairment by d-Amphetamine of Delayed Matching Performance in Monkeys. STANLEY D. GLICK AND MURRAY E. JARVIK 1 Behavioral Effects of N,N-Diethyltryptarnine: Absence of Antagonism by Xylamidine Tosylate. J. C. WINTER 7 Narcotic-Antagonist Analgesics : Interactions with Cholinergic Systems. LOUIS S. HARRIS, WILLIAM L. DEWEY, JOHN F. HowEs, JAMES S. KENNEDY AND HARRY PARS 17 Brain Acetylcholine Levels and Inhibition of the Tail-Flick Reflex in Mice. JOHN F. HowEs, Louis S. HARRIS, WILLIAM L. DEWEY AND CAROL A. VOYDA 23 Agonist and Antagonist Interactions of Opioids on Acetic Acid-Induced Abdominal Stretching in Mice. ROBERT I. TABER, DOROTHY D. GREENHOUSE, JILL K. RENDELL AND SAMUEL IRWIN 29 Quantitative Studies of the Antagonism of Morphine by Nalorphine and Naloxone. A. E. TAKEMORI, HARVEY J. KUPFERBERG AND JACK W. MILLER 39 Effects of Lanthanum on Contraction, Calcium Distribution and Ca4’ Movements in Intestinal Smooth Muscle. GEORGE B. WEISs AND FRANK R. GOODMAN 46 Effects of Sodium-Deficient Medium and Ouabain on Potassium Exchange in Taenia Coli. MADGE A. PFAFFMAN AND WILLIAM C. HOLLAND 56 The Effects of Theophylline, Diazoxide and Imidazole on Isoproterenol-Induced Inhibition of the Rabbit fleum. BYRON E. WILKENFELD AND BERNARD LEVY... 61 The Accumulation of C’4-Serotonin in the Guinea-Pig Vas Deferens. NGUYEN B.