Gilmore 1931 CLEITHRONOMYS SYNAPTOMYS June 9 Cascade Creek, Norton Sound, Alaska - No 1583 was trapped among dry grass & leaves in a canyon bottom. It was an accidental catch for I hadn't supposed anything there when I set the trap. June 21 - July 12 Sevoonga, St. Lawrence Is., Bering Sea, Alaska. The three caught here were taken among jumbled rocks of an ankle cookery. Some traps produced shrews also & anklets - no Microtus. The Natures know of their existence & seem to indicate that they are to be found only in such a habitat. Anyhow they are scarce for a line of 30-40 traps produced only 3 in 2 wks.