Essays in Marine Biology THB RICHARD ELMHIRST MEMORIAL LBCTURES CONTENTS: The Locomotion of Fishes by JAMES GRAY.—Fin Patterns and Mode of Life in Fishes by JOHN E. HARRIS.—Aspects of Life on Muddy Shores by c. M. YONGE.—Life on Some Sandy Shores by A. C. STEPHEN.— The World between Tidemarks by T. A. STEPHENSON.—Some Problems of Pelagic Life by ALISTER C. HARDY.—The Production of Animal Plankton in the Sea by s. M. MARSHALL and A. P. ORR. Illustrated 12s. 6d. Biology of a Marine Copepod S. M. MARSHALL and A. P. ORR A summary of the research conducted into the anatomy, life history, physiology and distribution of Calanus finmarchicus since its discovery in 1767. In addition some original work is described and a mass of data has been made available which was previously scattered in various scientific journals. Illustrated 2\s. OLIVER & BOYD TWEEDDALE COURT, EDINBURGH 1 THE JOURNAL OF PHYSIOLOGY DECEMBER 1956. VOL. 134, NO. 3 CSAPO, A. and WILKIE, D. R. The dynamics of the effect MORRISON, S. D. The total energy and water metabolism of potassium on frog's muscle. during pregnancy in the rat. DOWSE, C. M., SAUNDERS, J. A. and SCHOFIELD B. The r^^ D . R ., KIDD, B. S. L. and PATTERSON, G. C. The composition of lipid from jejunal contents of the dog reactions of the blood vessels of the human calf to after a ratty meal. increases in transmural pressure. WILKIE, D. R. Measurement of the series elastic com- _ _ , , r- „ „ . . _ . ponent at various times during a single muscle twitch. JERVIS, E. LESLY, JOHNSON, F. R., SHEFF, M. F. and i f & D £ S^&S^ST ^ ™ al BISHOP, P. O. and EVANS, W. A. The refractory period of FURSHPAN, E. J. The effects of osmotic pressure changes the sensory synapses of the lateral geniculate nucleus. on the spontaneous activity at motor nerve endings. DAY, MARGARET. The release of substances like acetyl- RITCHIE, J. M. and STRAUB, R. W. The after-effects of choline and adrenaline by the isolated rabbit heart. repetitive stimulation on mammalian non-medullated NIEDERGERKE, R. The 'staircase 1 phenomenon and the fibres. action of calciurnon the heart RITCHIE, J. M. and STRAUB, R. W. The effect of cooling NIEDERGERKE, R. The potassium chloride contracture of o n t h e size of the action po tentia i of mammalian non- the heart and its modification by calcium. meduUated fibres. HALLIDAY, A. M. and REDFEARN, J. W. T. An analysis of the frequencies of finger tremor in healthy subjects. HEBB CATHERINE O. and SILVER, ANN. Choline acetylase EDHOLM, O. G., FOX, R. H. and MACPHERSON, R. K. The J? <** « ntral nervous ****"> ° f m an « nd some ° ther effect of body heating on the circulation in skin and mammals. muscle. ANDREW, B. L. The nervous control of the cervical BRIDGES, C. D. B. The visual pigments of the rainbow oesophagus of the rat during swallowing. trout {Salmo irideus). STRANGE, PRISCILLA H. Pitch-intensity dependence and SHEPHARD, R. J. Assessment of ventilatory efficiency by its relation to the threshold of hearing for big h the single-breath technique. frequencies. Subscription price 80s. net per volume of 3 parts CAMBRIDGE UNIVERSITY PRESS BENTLEY HOUSE, 200 EUSTON ROAD, LONDON, N.W.I