Note 250 — Chapter XX · THE RELATIONS BETWEEN LAMARCKISM AND DARWINISM; NEOLAMARCKISM
Reading edition
Revue Encyclopédique, 1897. p. 325. Yet we have an example of the appearance of a new organ in the case of the duckbill, in which the horny plates take the place of the teeth which Poulton has discovered in the embryo. Other cases are the adductor muscles of shelled crustacea. (See p. 418.)