The capitalizing and italicizing of certain or all of the words in a synonym-list indicates that the words so distinguished are discriminated in the text immediately following, or under the title referred to.

The figures by which the synonym-lists are sometimes divided indicate the senses or definitions with which they are connected.

The title-words begin with a small (lower-case) letter, or with a capital, according to usage. When usage differs, in this matter, with the different senses of a word, the abbreviations [cap.] for "capital " and [l. c.] for "lowercase" are used to indicate this variation.

The difference observed in regard to the capitalizing of the second element in zoological and botanical terms is in accordance with the existing usage in the two sciences. Thus, in zoology, in a scientific name consisting of two words the second of which is derived from a proper name, only the first would be capitalized. But a name of similar derivation in botany would have the second element also capitalized.

The names of zoological and botanical classes, orders, families, genera, etc., have been uniformly italicized, in accordance with the present usage of scientific writers.