[105] Cosmos, Vol. VII, p. 388.
[106] King pointed out the fallacy of this argument.
[107] Roux’s earlier experiments in 1885, in which the unsegmented or segmented egg was stuck and a part of its contents removed, the remaining part making a whole embryo, will be considered in another connection.
[108] This had been first discovered by Newport in 1851.
[109] The cross-section C is reversed as compared with the half-embryo B.
[110] This difference is due, I suppose, to the amount of injury that the nucleus of the injured half may have suffered.
[111] The development of isolated blastomeres of the ctenophore egg shows that this need not be the case.
[112] In one case a half-embryo resulted.
[113] The plane of the first cleavage has been shown in two urodeles to correspond, not to the median longitudinal plane, but to a cross-plane of the embryo.
[114] In some cases, especially in sphærechinus, even at the eight-celled stage, the blastomeres seem to shift their position, so that a whole sphere of half size is formed.