627 Gilmore 1931 MICROTUS (cont.) (9) pitched squeaking noise that was a note of alarm or interest rather than fear and pain. Observing microtus in such great numbers and in such close and in- timate contact was very interesting. Foxes would certainly find easy picking on the mouse population + undoubtedly preyed upon them considerably as a side menu from nesting birds. I'm write the mice form probably the only source of food for the foxes. No pregnant females noted. Sept. 15- Unalaska, Unalaska Is., Alaska, Aleutian Is. Moderately common around here from sea level to the tops of the ridges. They seem to live everywhere do nowhere in very great numbers.. Spec. 2082 was a young, 9 and had three embryos, all in the same uteral horn. Probably it was her first litter. All the rest of the females seem to have some litters some weeks previously. The great majority of the victims from the trap line seem to be almost full grown immatures or full adults. Thus