Die Wahrscheinlichkeit dieser Ansicht wird durch die Thatsache unterstützt, dass unter dem grossen Heere veränderlicher Formen immer einzelne gefunden werden, welche in dem einen oder anderen Merkmale constant bleiben, wenn nur jeder fremde Einfluss sorgfältig abgehalten wird.
The likelihood of this view is supported by the fact that among the huge array of variable forms one always finds some which remain constant in one or the other trait, as long as all foreign influence is carefully held away.
array = Heer We follow both Bateson and Sherwood here. Literally, the term Heer means “army”. The metaphor is still quite common in German to express large numbers.
variable forms = veränderlicher Formen See p. 36, s. 8.
forms … which remain constant = Formen … welche constant bleiben See p. 15, s. 7.
foreign influence = fremder Einfluss That is, as long as cross-fertilisation can be avoided; see p. 5, s. 6.