be compared to the different successive stages in the livesrnof certain parasites, which go through a cycle which is apparentlyrncapricious, but which is in fact necessary to theirrncomplete development. They must, for instance, gornthrough a river mollusc, then pass into a sheep, and finallyrnlodge, not without deleterious effects, in the . . .
January 1975April 21, 2022By The Archive
Leave a Reply