Intergradation with _richardsonii_ probably occurs completely across the continent. Intergrades here referred to _arctica_ include those from Fort Goodhope. The one defective specimen from Lake Lebarge, Yukon, is not certainly identified as _arctica_ and how far west of Teslin Lake the boundary-line between _arctica_ and _richardsonii_ should be drawn remains to be ascertained. The one specimen available from Hinchenbrook Island, no. 912 Mus. Vert. Zoöl., an adult female, is doubtfully referred to _arctica_ because the damaged tympanic bullae appear to be no larger than in _alascensis_, and the size of the skull is more as in _alascensis_ although intermediate between that race and _arctica_. Shape of the skull is more as in _arctica_. Possibly more nearly adequate material would show the existence on Hinchenbrook Island of an insular race differing in about the same degree from _arctica_ of the mainland as does the insular _kadiacensis_. Nevertheless, the males from farther south at Cape Yakataga are in all respects _arctica_ and this argues against near relationship to _alascensis_ of the animal on Hinchenbrook Island. The three animals seen from Yakutat Bay are so young as not to display clearly the cranial characters of the subspecies but the extension of the color of the underparts onto the underside of the tail in them and also in the skin without corresponding skull from Glacier Bay, Alaska, is as in _arctica_, the race to which they are referred, and gives substantial basis for showing the geographic range of _arctica_ as extending this far south along the Pacific Coast. _Specimens examined._--Total number, 281, arranged alphabetically by Districts and from north to south in each District. Unless otherwise indicated, specimens are in the collection of the United States National Museum.