188 



Till: GENESIS OE Sl'EClES. 



[Chap. 



aiul iiideccl he says, " The nature of the bond of coirchition 

 is freciuently quite obscure." Now, it is surely more desir- 

 able to make use, if possible, of one conce})tion than to im- 

 agine a number of, to all a})j)earance, se})arate and inde- 

 pendent " laws of correlation " between diilerent j)arts of 

 each animal. 



But even some of these alleged laws hardly appear well 

 founded. 'J'hus Mr. Darwin, in supjxjrt of such a law of 

 concomitant variation as regards hair and teeth, brings for- 

 ward the case of Julia Pastrana,'^ and a man of the Jiurmese 

 court, and adds : *" " These cases and those of the hairless 

 dogs forcibly call to mind the fact that the two orders of 

 mannnals, namely, the Edentata and Cetacea, "which are 

 the most abnormal in their dermal covering, are likewise 



TIIK AAUU-V.VJtK (oUY<;TKKOI'IIh). 



the most abnormal either by deficiency or redundacy of 

 teeth." The assertion with regard to these orders is cer- 



>8 A remarkable woman exhibited in London a few years ago. 

 13 "Animals and Plants under Domestication," vol. ii., p. 328. 



