Excerpt from British Fresh-Water Copepoda, Vol. 3 Something must also be said here about the limitation of genera. Very large, undivided genera are, in practice, very inconvenient, but to break up such a genus into a number of smaller genera of equal rank is apt to obscure the relationship of the units. This objection is largely met by making the smaller units subgenera, just as the objection to splitting species is largely met by making the new units subspecies. It is necessary to beware of making too many subgenera, ...
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Excerpt from British Fresh-Water Copepoda, Vol. 3 Something must also be said here about the limitation of genera. Very large, undivided genera are, in practice, very inconvenient, but to break up such a genus into a number of smaller genera of equal rank is apt to obscure the relationship of the units. This objection is largely met by making the smaller units subgenera, just as the objection to splitting species is largely met by making the new units subspecies. It is necessary to beware of making too many subgenera, since, the finer the distinctions drawn, the more difficult it is to make these units practically useful. In the case of Cyclops the distinctions drawn by Kiefer are often so fine as to be, in my opinion, quite unpractical. It may often be the case that one can discern related groups of species within a genus or subgenus, and yet be unable to frame an unambiguous definition for them. In such cases a shadowy definition with a name seems to be positively harmful. The relation can be expressed much better by Schmeil's groups. Any other course is bound to lead in the end to the subgenus approaching very near to the limit of the species. The process of narrower and narrower limitation of groups is also cumulative. It becomes more and more difficult to place a new species in an established group, and another new genus or subgenus has to be made to receive it. For this reason I feel it is most unfortunate that Kiefer should haveviii preface. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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