Abstract. 1. 1. Tæniasis is the cause of more morbidity than is usually admitted and cases of death from this cause are seen from time to time. 2. 2. A mixture of carbon tetrachloride and oil of chenopodium in the proportion of 3 to 1 is a safe and efficient anthelmintic against T. saginata. 3. 3. Certain simple precautions must be rigidly adhered to if the treatment is to be used in out-patient practice.