Show tie oldest living creature among the oldest life forms on the globe Is the shellfish knonk as the a specimen of which was ta ken from manila bay several sears ago the genus according to eclen tests has remained practically unal for more than a hundred million years the extraordinary cli anges of climate and environment since the world began most forms of life with which science is familiar have bea trinston ned or have altogether disappeared since he geologic ages eliat the genus says the journal of heredity Her edits should have survived for all these ages and tinder gone virtually no change is striking evidence of the fact that the germ which under some condition as in the case of the horse and the dog Is capable of nary variation Is under other condl alons remarkably constant |