THE RELATION OF MORTALITY AFTER ENDOMIXIS TO THE PRIOR INTERENDOMICTIC INTERVAL IN PARAMECIUM AURELIA

摘要: 1. Using an interendomictic interval of 20 to 30 days as a standard, it was shown that intervals approximately two, three, four, and five times this long resulted in progressive increases mortality after endomixis until 100 per cent occurred.2. At greater than this, the animals died before could be induced under conditions favorable for its induction.3. The mean number generations which non-viable lines survived climax 5.0 5.9 when previous normal extent. After 125 days, survival dropped greatly 0.9 generation.4. results are disagree with current interpretations at based on concept pathological process.5. show unusually are, like other previously known conditions, cause "natural death" Protozoa.