nov. 14 Michael Christie back from the British museum reports confusion in Octodon. They have a type and a co-type of C. bridgesi bearing assorted numbers, localities added later, etc., also a number of O. degus but none labelled sermatus. Sunny & warm. nov. 15. Sunny, warm. Left at 3:30 p.m. with Michael Christie for Estancia Chocaluco. The administrador of the estancia, Jorge [illegible], says lots of tusks up inferior some smaller. Couldn't get up the steep stony grade so left our 2 care at the bottom and hiked perhaps 1/2 km across a meadow to Michael's area (not the same one as Jorge's). There were 3 limited areas with lots of two-sized burrows, gos + juvenes muddled around the bocas, but no fresh dirt excavated. In fact, very little excavated earth. One area had lots of juvenes with tough rhinoever, the second area very little juvenes. The third area was grazed almost park-like with scores of bocas. Weather warm, calm, set steel, mouse traps, cage traps till 8 p.m., and bait set MS and mouse traps, many of them underground. Beautiful dight fluffy black soil. Many burrows were wide open, larg enough to put speer hand into and they most of them larg enough to set a no. 5 steel trap with only a little excavating. Many plugged with soft plugs of cut grass + loose earth, easily scooped out. Not mixed with droppings. Saw a few Rattus/ves droppings in these 3 areas, but not a lot. Droppings of Rattus/ves also common in other bunchgrass areas and even in Espina negra. The