LITHISTID SPONGES FROM THE LATE ORDOVICIAN FISH HAVEN DOLOMITE, BEAR RIVER RANGE, CACHE-COUNTY, UTAH

The tricranoclad demosponge Hindia sphaeroidalis Duncan, 1879, is repo rted as a common silicified sponge in the basal dolomite of the Deep L akes Member of the Upper Ordovician Fish Haven Formation of northeaste rn Utah for the first time. A small juvenile orchoclad anthaspidellid, Hudsonospongia? sp., is also the first of that family reported from F ish Haven beds and the Deep Lakes Member. Both taxa are from localitie s on the eastern slope of Mount Magog, north of Tony Grove Lake, in th e Bear River Range, Cache County, east of Logan, Utah.