Abundant information on drilling predation upon fossil bivalves, gastropods, and brachiopods has been accumulated during the past severaldecades, but very little is known about the predation on marine, infaunal carnivorous scaphopods. A survey of over 440 specimens of the scaphopodDentalium gracilecollected from the Upper Cretaceous Millwood Member (Campanian) of the Pierre Shale at a site near Russell, Manitobadisplays a drilling percentage of approximately 35%. This figure is higher than previously reported for the scaphopods of similar age elsewhere,but is comparable to or lower than that of the sub-Holocene (34–61%). The difference in drilling percentage among different collections may betaxon-related or affected by the composition and structure of the fossil community. Morphologically, the drill-holes, produced by predatory drilling,are beveled with a countersunk profile of clean sharp edges. The drill-hole inner margin is ovate whereas the outer margin is nearly circular. Amongthe Manitoba specimens, drill-holes seem to be more common on the lateral side. Presumably due to the lack of effective defense strategy, the preyeffectiveness is low (∼3.2%). There is no correlation between drill-hole dimension and scaphopod prey size, indicating that predator size does notcorrelate with the prey size. Nearly 480 specimens of cephalopods, pelecypods, and gastropods were also collected from the same community.There were only a total of 16 drill-holes on this additional material. Over 400 specimens of the only naticidEuspira obliquatawere recovered fromthe same site and are believed to be the predators of the scaphopods and other molluscs. The low percentage (∼2.5%) of drilling on the abundantgastropodE. obliquatamay indicate mistaken or opportunistic attacks by the predator, or that the cannibalism is not common in this community.© 2011 Elsevier Ltd and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserv