Eighty‐four neurons were recorded from and correlated with cytoarchitectural fields: 21 were located in the globular cell area, 19 in the multipolar cell area, 17 in the small spherical cell area, 11 in the octopus cell area, 8 in the dorsal cochlear nucleus, and 6 in the large spherical cell area. Eight neurons were successfully marked by intracellular injection of procion yellow. Units in small spherical cell area (best frequencies, 0.475–11.500 kHz) rarely display tight phase locking and show a characteristic “onset” response followed by decreased activity. Neurons in the multipolar cell area (best frequencies, 0.10–1.45 kHz) are mostly low‐frequency phase lockers. There is great physiological and cellular diversity in globular cell area (best frequencies, 0.24–34.10 kHz). Units in the octopus cell area (best frequencies, 1.4–21.5 kHz) typically display high rates of spontaneous and driven activity. Neurons in large spherical cell area (best frequencies, 0.8–14.5 kHz) have interspike interval histograms of spontaneous activity with short modes and rapid decay. Long modes and a high degree of symmetry characterize neurons in dorsal cochlear nucleus (best frequencies, 0.5–10.9 kHz). [Supported by NIH grants.]