620 MICROTUS Gilman (1931) These fatty areas probably have an odiferous function of some kind. F's have 4 pairs teats. 1 inguinal, 1 lower abdominal, 1 upper thoracic, + 1 axillary. June 11 Unalakleet Norton St., Alaska Very common even in town. Mason caught two two in afternoon after we saw them run into burrows in the tundra. Probably bear more than one litter a year. June 25 Sevoonga, St. Lawrence St., Bering. Sea Alaska F's have four pairs of teats - 1 inguinal, 1 lower abdominal, 1 upper thoracic and 1 axillary. Both F's & M have a growth of fatty tissue around the anus. The the growth on the F's is much larger. F's in addition have a glandular area covering flanks & buttocks just under the skin. This glandular tissue adheres to the skin when the animal is being skinned and cannot be removed without tearing the skin. Sounds like a skin game, I guess. Remaways of these mice are everywhere.