Bay seniors, this is your last weekend to visit the museum you’ve never heard of’s exhibit of American Indian Jewelry of California and the Southwest. The Marin Indian Museum is tucked away in outer suburbia in the city of Novato. It’s been around since 1967 but has the lowest profile of any arts institution in the Bay Area. The current misnamed exhibit encompasses jewelry, Northwest masks, Navaho textiles, Plains beadwork and baskets. It’s surprises us to realize that what is now Sonoma County was home to 600 Pomo and Miwok Indian villages whose remains can be visited at Olompali and Point Reyes.They lived here for thousands of years without developing really advanced tribal arts. Life, then as now, was probably too good, too easy in Marin to bother.