OCR Text |
Show 1890.] EXPRESS GEOGRAPHICAL DISTRIBUTION. G09 AUSTRALIAN NEOTROPICAL 2. Australia. 3. Polynesia. 4. New Zealand. 2. Chili. 3. Antilles. 4. Brazil. The only irregularity of importance is in the Nearctic region- There the Canadian subregion is to the north of three other sub-regions, and the figure 1 is placed vertically above 2, 3, 4. NEARCTIC 1. Canada. 2. California. 3. Rockies. 4. Eastern States. The distribution of an animal or of a group is represented by writing in their proper positions the subregions in which the animal or group occurs. Thus a universal distribution is indicated by fig. 3. A partial distribution, for instance the distribution of the Lemurs, is given in fig. 4. Fig. 3. 2 3 4 1 3 2 4 2 1 3 2 4 4 1 3 2 4 1 3 2 4 Fig. 4. 1 3 1 3 J2J1 4 T~ The formula represents the facts almost as faithfully as does a coloured map. It can be written and copied with the utmost rapidity, and it can be printed without engraving by the use of type-lines. Elaboration is easy, but the simplicity of the formula in its present form seems an advantage. |