The aims of this book are two-fold: (i) to document unusual or rare samples of Eocene fossils, and (ii) to examine what sorts of new and different information can be gathered from these samples that is traditionally not available. New information may come in the form of a better understanding of morphology through specialized preservational circumstances that produce complete specimens, often with details of soft tissue anatomy. Other new information includes a better understanding of Eocene Biodiversity through documentation of fossil species from rarely sampled habitats. This may include evidence from rarely sampled geographic areas (African Eocene faunas are rare, for example) that will aid in a better understanding of the biogeographic distribution of Eocene animals. It may also include evidence from rarely sampled microhabitats (freshwater limestone deposits, for example) or different physiographic areas (upland areas that are almost never sampled, for example). This information, which is available nowhere else, gives a new perspective on Eocene Biodiversity and shows that it was even more complex than previously thought.