The layout of the book takes the reader through the basic requirements of successfully maintaining aquatic and semi aquatic Chelonia in captivity.
These Trematodes occur in the alimentary canal and adjacent organs of Mollusca, the gall-bladder of Chimaera, and the intestine of Chelonia and of certain fish.
It is significant that the whole type of their cloaca much resembles that of the Crocodilia and Chelonia, in opposition to that of the Lacertilia.
Prawns, crayfish and oysters are also obtainable, and turtle (Chelonia mydas) are frequently captured.