The sources of calcium for the ossification of the embryos of the giant leathery turtle

摘要: Abstract 1. In the Chelonia there is no alteration of bone structure which can be associated with a storage calcium prior to egg laying. 2. The content yolk varies greatly among different species turtles. 3. ossification skeleton Dermochelys coriacea embryos occurs mainly in later half incubation and well advanced at time hatching. 4. embryo coreacea obtains about 75 per cent its from outside contents. 5. There some evidence that hatching marine turtles contain large quantities magnesium may indicate absorption salts sea. 6. Unlike situation birds, eggshell not structurally altered by developing embryo.