The collection contains unique neurohistological preparations of the nervous system in the body wall and internal organs and of the CNS of the earthworm Allolobophora caliginosa (Aporrectodea caliginosa) stained supravitally with methylene blue. The collection was donated by close relatives of G.A. Nevmyvaka to the Laboratory of Evolutionary Morphology of the Zoological Institute RAS, where it is currently stored.