. The breeding of fur animals. FUR ANIMALS 1389 Thus foxes of the genus Vulpes may have three kinds of pelts: (1) The common red fox, which is primarily red or fulvous with a mixture of gray or brown except for restricted black markings on the feet and ears, a white area at the end of the tail, and certain white-banded hairs on the back and rump; (2) the typical cross fox, in which black predominates on the feet, legs, and under parts, v hile red or fulvous overlying black covers most of the head, shoul- ders, and back; and (3) the black (silver) fox, which carries no red or fulvous, the entir
. The breeding of fur animals. FUR ANIMALS 1389 Thus foxes of the genus Vulpes may have three kinds of pelts: (1) The common red fox, which is primarily red or fulvous with a mixture of gray or brown except for restricted black markings on the feet and ears, a white area at the end of the tail, and certain white-banded hairs on the back and rump; (2) the typical cross fox, in which black predominates on the feet, legs, and under parts, v hile red or fulvous overlying black covers most of the head, shoul- ders, and back; and (3) the black (silver) fox, which carries no red or fulvous, the entire pel- age being dark at the base and heavily or lightly overlaid with the banded guard hairs that produce the silvery appearance. These guard hairs are not entirely white but are black with a white band, and some are en- tirely black. Foxes of the third group vary from animals that are almost entirely silver Figure 5.—Litter of pups resulting from cross-breeding to those that are en- a silver with a red fox. tirely black except for a few white-banded guard hairs on the back and rump. The fur trade recognizes five classes of silver fox pelts, graded according to the per- centage of silver, as follows: Full, three-quarters, half, one-quarter, and slightly silver or dark. It is believed that what are called standard silver foxes, carrying a factor for silver and black color, were found naturally in many parts of Canada. Few if any of these foxes migrated into Alaska. On the other hand, the progeny of Alaskan silver foxes, also carrying a factor for the silver and black color, probably traveled southward over the mountain range and spread over a large part of Canada. Neither the Alaskan nor the standard silvers migrated to any extent south of the Great Lakes and the St. Lawrence River. The indications are, however, that some foxes possessing either or both of these factors for silver and black must have migrated or occurred naturally south into the northern parts of the States b
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