On reaching the North American coast, he proceeded northward, fixed the position of the western extremity of America and surveyed Bering Strait.
The north to south distance from Bering Strait to the Antarctic circle is 9300 m., and the Pacific attains its greatest breadth, 10,000 m., at the equator.
Evidently the family originated in the northern continent of the Old World, from which an entrance was effected by way of Bering Strait into America.
The home of the family was evidently the Old World, whence a small number of forms made their way into North America by way of what is now Bering Strait.
They are undoubtedly a group of European or Asiatic origin, and obtained an entrance into America at a time when that continent was connected with Asia by way of Bering Strait.
