Die aus der ersten Befruchtung hervorgehende Hybride bildet 8 verschiedene Arten von Keimzellen nämlich:
ABC, ABc, AbC, aBC, Abc, aBc, abC, abc.
The hybrid arising from the first fertilisation forms 8 different species of germ cells, namely:
ABC, ABc, AbC, aBC, Abc, aBc, abC, abc.
The manuscript has a comma before nämlich.
species = Art Both Bateson and Sherwood have “kinds”; see p. 6, s. 14.
germ cells = Keimzellen See p. 24, s. 4.