Comparative Neurochemistry, a collection of papers presented at the Fifth International Symposium of Comparative Neurochemistry, held at St. Wolfgang, Austria in 1962, deals with variations in neurochemical mechanisms in different animal species. The book integrates the data derived from comparative studies in different disciplines and assesses their significance in relation to the understanding of nervous mechanisms in animals, including human. The papers are grouped into sections, which cover general topics on functional organization in different species; lipids, proteins, and ribonucleic acid; amino acids in different species; energy metabolism and function; neurosecretory mechanisms; and comparative neuropharmacology. The text will be of interest to biologists, zoologists, pharmacologists, chemists, neurologists, and researchers in the pharmaceutical and chemical industries.