Table 1. Analysis of the degree of influence 

 of latitude on the number of species. 



Table 2. The mean number of species found at 

 the various latitudes. 



K2 



Four separate analyses of variance were made, one for each taxon and its dependence on 

 latitude, and the parameters calculated are given in Table 1. The decreasing number of degrees 

 of freedom for Reptiles and Amphibians are explained as follows: representatives of these taxa 

 at latitudes above 7"° a re found only as exceptions. From the preceding table, it is obvious 

 that latitude imparts its maximum influence on the richness of fauna of the birds, while the 

 po ik i lotherms, apparently, are more influenced by other factors. The empirical significances of 

 the regression of the number of species with latitude are given in Table 2. Attention is drawn 

 to the fact that the number of species diminishes with increase in latitude in all cases except 

 amphibians. The alien value for po ik i lotherms makes it foolish to search for interpreting formulas, 

 whereas for homeotherms, the values are all alike (Figures 1 and 2). 



Mammals: y = 102. IO5O + 0.2670* - 0.0178 x 2 

 Birds: y = -24.4275 + H.959OX - 0.1401 x 2 



70' «0° 6T W 



: igure 1. Regression of number of species of 

 nammals on geographic latitude. The abscissa 

 is graduated in degrees latitude, the ordinate 

 in number of species. 



Figure 2. Regression of number of species of 

 birds on geographic latitude (abscissa and 

 ordinate are the same as ; n Figure l). 



The analyses of variance based on longitude give the figures presented in Table J. The 

 homeotherms show no correlation with longitude, but there is a weak correlation with longitude 

 for the po ik i lotherms. Therefore, the detailed analysis of regress icn ( Table 4) does not have 

 meaning, although it does demonstrate the presence of two patterns: the number of species of 

 homeotherms generally decreases from West to East (an artifact of the study?), whereas the 



Table 3. Analysi 

 longitude on the 



of degree of influence of 

 jmber of spec i es. 



Table 4. 

 ring at 1 



long 



imbers of species 

 tudes. 



Longitude 



