Mustiangi, Meika A. 1994 journal 67 Sítio São José da Serra-RJ 14 August We left Boraceia on 7 August. I took 1 male and 2 female Marmosops- Northern species to Marta Swartman at USP for her karyological studies. It still rains in and out. So we never caught Marmosops- Southern species in Boraceia, despite catching several individuals of the N species. All of them were caught in forest groves. We caught none on trapline along the crest of the scarpment (trail that runs behind the house). This trip was a pretty successful mammal expedition. We spotted an otter (by the 'torre' = tower), saw Cebus crossing the trail ahead of us (5:30 pm, on trail along scarpment ridge) and drove behind a tapir on the road at night. Not to mention of course the many Marmosops and a few Gracilinanus and Rhidopomys and Oxymycterus, the latter unfortunately all in snaptraps, therefore dead and not prove for chromosome preparation. On my previous 2 trips to Boraceia I had never caught any mouse opossum. Today we are already at the farm in Serra dos Órgãos, an arm of the