The zwim, Naremys platycaudus, is a semiaquatic, shrew-like placental mammal from the deciduous and mixed woodlands of Eurasia in The New Dinosaurs: An Alternative Evolution. It is probably descended from Zalambdalestes. In outward appearance many of the mammals have changed little since they evolved from the non-mammalian synapsids in Late Triassic times. Throughout the Jurassic, Cretaceous, Paleogene and Neogene periods they have remained small, compact creatures, not adapting into any of the