Abstract
Investigations of the growth of skull, especially its evolutional processes measured from the hypophyseal point, are of much interest for both the scholars of ethnology and comparative anatomy. Above all, the comparative anatomy of the cranial curvatures of different species of animal is important from the standpoint of phylogeny, while practically no study of this type has appeared in the literature as yet.
Stated in the following are the findings of the investigation made on dogs comparisons being made with similar findings of other species of animal available.
The mean distance between P and Br is 3.86 ± 0.077cm,
P and H is 3.78 ± 0.089 cm, and
P and G' is 3.65 ± 0.085 cm.
No particular difference in the above measurements was observed by the difference of sex.
From the viewpoint of comparative anatomy, human beings show the longest distance in either one of the above three measurements, and those of the chimpanzee, gorilla, and Orang-Utah followed in the order listed. While, the dog show P-Br and P-H distances shor-ter than those of the anthropoid ape. On the other hand, the distance of P-G in the dog is shorter than that of the chimpanzee, but longer than that of the Orang-Utan or of the gorilla.
