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Show 1896.] RULES OF ZOOLOGICAL NOMENCLATURE. 317 at the same date, so that the priority canuot be ascertained, the decision of the first author that points out the synonymy should be followed. 17. In the case of species with a cycle of generation of different forms, the specific term must be taken from an adult form capable of reproduction. In these cases, as also in species in which Polymorphy occurs, the L a w of Priority must be observed. 18. The author of the specific name is the author of the species. 19. The author's name should be placed in parentheses when the original generic name is replaced by another. 20. Hybrids should be designated either by a horizontal cross between the parents' names, or by these names being placed one above the other with a line between. The parents' sexes should be stated, when known. The name of the describer of the hybrid should be added, preceded by a comma. C. RULES EOR THE NAMES OE SUBSPECIES AND OTHER DIVERGENCES EROM TYPICAL SPECIES OR SUBSPECIES. 21. W h e n constant local forms, varieties, strains, & c require special names, these names should be placed after the specific name. The rules for such names are the same as those for specific names. D. RULES FOR GENERIC NAMES. 22. Names of genera should be substantives, and of the singular number. They should be one word and be written with a large initial letter. If a subgenus is used, its name (which follows the same rules as a generic name) should be given in parentheses after the generic name. 23. A generic name is only valid when a known or a sufficiently characterized species (or several species) i3 referred to it, or when a sufficient diagnosis of it is given. 24. The same generic name can only be employed once in Zoology Nor can names already proposed as subgeneric be employed also as generic names in another sense. 25, W h e n several generic names are proposed for a genus at nearly the same date, so that their priority cannot be settled, the name for which a type-species is given is to be preferred. In all uncertain cases the decision of the author who first arranges the synonymy is to be followed. 26. W h e n a genus is separated into several genera the old name must be retained for the type-species. If this cannot be positively ascertained, the author who splits up the genus must select one of the species originally in the genus as the type. W h e n a subgenus is raised to generic rank the subgeneric name becomes the generic name. E. RULES FOR THE NAMES OF THE HIGHER SYSTEMATIC GROUPS. 27. Names for higher systematic groups of animals must have a plural termination. |
