REGIONAL DISTRIBUTION. 303 



extent from both, it is not so much in principle as in the estimate of the value of the difiercnt 

 divisions, and in the boundaries and extent to bo allotted to each. Their distribution no doubt 

 refers to different branches of organic life in my present subject. Mammals, but I believe 

 the extent of difference to be attributed to that score is very trifling. 



From Dr. Hooker I differ in company with Dr. Slater, as to the value to be given to the 

 Siberian, Egj'ptian, European, and Chinese types. If North and South America are to go too-ether 

 as one, then surely these Old-world pro^nnces shoidd in like manner only form jjart of the n-roat 

 Europaeo- Asiatic region. 



From Dr. Sclater again I differ, whether in company with Dr. Hooker or not, I am not sure, 

 in reckoning- North and South Amei'ica as one sreat retrion. 



I differ from both in thinking that in estimating the great regions of the earth, we ouoht 

 to include the Indo-Malayan region along with Africa, south of the Sahara. 



In some other minor points I have also come to different conclusions from them. I shall, 

 however, best indicate the points of divergence by stating separately my own views on the subject. 



