A well rounded discussion of trichinosis by Seifert covers such topics as the history, morphology and life cycle of the parasite, geographic distribution, pathology, epidemiology, clinical picture, treatment and prophylaxis. This section is, however, simply a revision, with few changes, of the same section by Stäubli in the second edition. The principal article is the account of the filarial worms by Fülleborn, who has himself contributed so much to our knowledge of this group. Probably in no other place can the reader find this subject treated so thoroughly from both the medical and the parasitologic points of view. The account of hydatid disease by Blumenthal stresses the clinical and diagnostic side of the subject with especial reference to the immunologic tests for the infection, in which is emphasized the fact, so often overlooked, that both complement fixation and cutaneous tests have reached a high degree of perfection in the diagnosis