Stockholm 1963. 267 pp. Printed wrapper. Wrapper chipped. Kjell Engström: Structure, organization and ultrastructure of the visual cells in the Teleost family Labridae. : Harry D. Rounds: A functional division in the nervous system of the cockroach, Blaberus gigantus (L). : E. S. E. Hafez and T. Stugie: Behavioural oestrus and ovulatory cycle in beef cattle with a note on the clay model technique. : Ronald Strahan: The behaviour of Myxinoids. : H. N. Bhargava: The devlopment of the cephalic arteries in Mastacembelus armatus (Cuv. & Val.) : Kjell Engström and Inga-Britt Ahlbert: Cone types and cone arrangement in retina of some flatfishes. : R. K. Shrivastava: The deltoid musculature of the Insectivoria. : Kjell Engström and Erik Rosstorp: Photomecanical responses in different cone types of Leuciscus rutilus. : Madelein Friant: Les Chiroptera (Chauves-souris). Révisions des Rhinolophidae de l'époque tertaire. : Kjell Engström: Cone types and cone arrangements in teleost retinae. : Gunnar Fridberg: Electron microscopy of the caudal neurosecretory system in Leuciscus rutilus and Phoxinuss phoxinus.