The second fascicle in volume 1 of series 5 contains pages 136-264. When this book was published in 1954, the helminth fauna of the Belgian Congo had been little studied. Based on a collection of cestodes belonging to the Musée Royal du Congo Belge, the author gives a description of these tapeworms, many of which are reported for the first time from what was known as Belgian Congo at the start of the 20th century. The collection includes worms from all the classes of vertebrates, and is especially rich in avian cestodes. There are five new species from birds and three from mammals, including one new genus. The cestodes found are listed in systematic order. Under the name of each worm is found its host, and in brackets follows the group to which the host belongs. Then comes the locality in which the material was collected, the collection number of the specimens, the collector, and the date, when they are known. All the drawings were made with the aid of a camera lucida unless otherwise stated.
This volume is a bound paperback, as opposed to other volumes which come as unbound pages in a folder.