Abstract
Insemination and the course of the first and second cleavage were cytologically investigated in the cross between the loach_??_ (Misgurnus angullicaudatus, Cobitidae) and the funa_??_ (Carassius carassius, Cyprinidae). Eggs of the loach were artificially inseminated with funa sperm at water temperatures from 24°to 26°C. It was found that the processes of both fertilization and early cleavage proceeded in rather normal manner in the loach-funa cross. There is no evidence in this cross to show that the sperm acted as a parthenogenetic agent.
