This latest edition of Chandler's “Introduction to Parasitology” has all the excellent qualities of its predecessors. It is so enlarged that the title no longer connotes the wide coverage of the subject. In fact, the clinical and public health features take the contents well beyond the category of an introductory textbook designed for use in undergraduate curricula where the subject is usually introduced. However, clinical discussions, as pointed out in the preface, are not dealt with sufficiently to satisfy the medical student—these are left for the professor to fill in. Chemotherapy and the newer treatment techniques are well handled, but at times such information is hidden. For example, the recent use of ACTH in trichiniasis is omitted in the discussion on trichiniasis but is briefly mentioned in “Introduction to the Worms.” Descriptions under the headings of pathology deal, for the most part with symptomatology rather than with pathology.