Crocodilian Biology and Evolution. G. C. Grigg, F. Seebacher, and C. E. Franklin (eds.). Surrey Beatty and Sons, Chipping Norton NSW, Australia, 446 p. Fossils of crocodilians and their extinct relatives are relatively common in the freshwater and sometimes marine fossil record since the Middle Triassic, but their study has not kept pace with that of their sexier relatives the dinosaurs. As the least specialized of the two living archosaur groups, crocodilians are critical to understanding the great archosaurian radiation that dominated terrestrial life during the Mesozoic and continues today as the great diversity of birds. However, the days are fortunately gone when crocodilians were considered as essentially living fossils little changed from the dawn of the Mesozoic. We now know that many of their features are adaptations to a semiaquatic lifestyle that …