Show Generations of Females Not only do many species of lower tower animals give birth to numer numer- numerous numerous numerous ous successive generations of fe fe- females females females males without the appearance or intervention of a male but some of them such as the crustaceans ms known as Cypris apparently never produce a male In a colony of this species that has been kept in inan inan inan an aquarium for the past thirty years no male has ever been dis dis- covered covered Colliers Colliers Collier's s Weekly |