Specification of neuronal identity in C. elegans, P.W. Sternberg, et al; segmental differentiation of lineally homologous neurons in the central nervous system of the leech, M. Shankland and M.Q. Martindale; control of central neurogenesis in the leech, T. Becker and E.R. Macagno; intrinsic and extrinsic factors influencing the development of retzius neurons in the leech nervous system, K.A. French and W.B. Kristan, Jr; the generation of neuronal diversity in the Drosophila embryonic central nervous system. R. Greenspan, initial determination of the neuroectoderm in Drosophila, C.Q. Doe; cell choice and patterning in the Drosophila retina, R.L. Cagan and S.L. Zipursky; development of the peripheral nervous system in Drosophila, A. Ghysen and C. Dambly-Chaudiere; endocrine influences on the postembryonic fates of identified neurons during insect metamorphosis, J.C. Weeks and R.B. Levine; neron determination in the ever-changing nervous system of hydra, H.R. Bode; cell lineage segregation in the vertebrate neural crest, M. Bronner-Fraser; the determination of neuronal identity in the mammalian cerebral cortex, S.K. McConnell; generation of neuronal diversity in the vertebrate retina, T.A. Reh; development of motoneuronal identity in the zebrafish, J.S. Eisen; cellular and molecular mechanisms determining neurotransmitter phenotypes in sympathetic neurons. Each chapter includes references, S.C. Landis.