of Linn?us (1707-1778) did the term acquire a definite and precise meaning. The aphorism of the great botanist, "species tot sunt divers? quot divers? form? ab initio

l rank in classification corresponding to no objective reality in the natural world. Some writers, as Lankester, have found so much fault with the term as to urge its complete abandonment in scientific literature. This is lo

we must endeavor to determine the sense in which it

ionary says that the term is used for "a classificatory group of animals or plants subordinate to a genus, and having members th

authority

rm and structure, and specifically characterized by the power of the in

e quote the following from a well-known scientist whose writ

ysiological species. By the one method a certain amount of difference of form, structure, and habit, constitutes species; according to the other, if the two

not the kinds are cross fertile, "is regarded as a most import