Om Fortplantning og Udvikling gjennem vexlende Generations-raekker.

Steenstrup is responsible for the theory of the “alternation of generations”. He showed that certain animals produce offspring which never resemble them but which, on the other hand, bring forth progeny which return in form and nature to their grandparents or more distant ancestors. An edition in German was also published in 1842. An English translation of the book was published by the Ray Society of London in 1845.