鳥類神經管ノ形成ニ就テ（第4報）（特ニ七面鳥ニ於ケル檢索）

As already stated in this journal, concering the composition of the nerviduct of birds, there is a difference in the periodical relationship of the respection embryo of the Columba domestica or the Anas domestica, and the Uroloncha domestica Flower, Therefore, I have additionally made a comparative Study of the Meleagris gallopavo Linnk along this line and obtained the following results: 1) The embryo in somite (?) has already found the nervous wrinkles and the nervous bank, exposing the neural groove. 2) In the somite (8) the nervous bank near the middle brain congregates conspicuously and finally revealing the omen of the nerviduct. 3) In the somite (19) the neuroporus auterior's mark is left and the neural groove closes completely from the rear. 4) In the somite (20) all traces of the neuropours anterior disappear, ultin ately accomplishing the closure of the nerviduct. 5) The Hensen's knot has not been conspicuously found in the embryo of the Meleagris gallopavo linnk, as well as those of the Columba domestica, the Anas domestica and the Uroloncha domestica Flower. 6) In the composition of the nerviduct of the Meleagris gallopavo Linnk, the neural groove colse from the rear at first, and then the neuroporus anterior closes up completely as well as those of the Columba domestica and the Uroloncha domestica Flower.