To the unobservant reader a cursory perusal of this book may be rather disheartening, by its apparent lack of systematic classification. Bilharzioses are treated on pp. 50–65, 210–222 and 280–301; leishmaniases on pp. 413–423, 515–522, 885–912; bancroftian filariasis (including Mansonella ozzardi) is dealt with on pp. 239–266, all other filariases (including A. perstans, but not D. streptocerca) on pp. 322–351. This is an error of judgment of the reader, which might have been avoided by reading the prefaces, which state that the authors wish the book to be useful to young physicians and medical students; for that reason they classify in accordance with the French manuals of medicine and the French methods of clinical examination: the several organs of the human body, not the parasites which invade them, are the basis of classification. The table of contents, at the end of the book, clearly brings out the merits of this clinical classification, but also the truth of the authors' saying that no classification is perfect.