CHAP. XL] AN EPISODE. 349 



though existing in an organ, was not the cause of that 

 organ. 



&quot; This was no doubt felt by the earlier opponents of Mr. 

 Darwin, who naturally opposed him on a priori grounds, and 

 the same feeling has led his supporters to desiderate criticism 

 from the physical-science standpoint, which can never be 

 quite conclusive, and can only be approximative^ so by going 

 into great detail. And this, when done, they in turn affect 

 to sneer at as minute. 



&quot; Mr. Chauncey Wright s remarks on mimicry do not call 

 for reply, as it is now conceded that imitation Criticalde . 

 occurs where Natural Selection cannot have de- tails - 

 veloped it. In reply to my criticism as to the origin of the 

 mammary gland, my opponent suggests that its development 

 may have been produced by a young mammal s clinging by 

 suction to the body of its dam, this clinging causing sebaceous 

 glands to be hypertrophied, and this hypertrophy causing their 

 secretion to become nutritious. I confess this seems to me an 

 extreme supposition. 



&quot; With regard to sexual selection, Mr. Chauncey Wright 

 asks, Is it credible Mr. Mivart can suppose that the higher 

 or spiritual emotions, like affection, taste, conscience, ever 

 act directly to modify or compete with the more energetic 

 lower impulses, and not rather by forestalling and indirectly 

 regulating them ? I answer, unhesitatingly, Yes ; and in 

 return say, Is it credible Mr. Chauncey Wright can suppose 

 they do not ? 



&quot; As to apes, it is enough to reply, that other animals are 

 also kept in cages, but do not exhibit the phenomena to which 

 I referred. 



&quot; Passing to the hoods and rattles of poisonous snakes, Mr. 

 Wright asserts that if their &quot; warnings &quot; are also used against 

 intended victims, they can only be used either to paralyse 

 them with terror or allure them from curiosity, &c. Has 

 Mr. Wright then never observed the tail of a cat when the 

 animal is watching a mouse ? 



&quot; A somewhat singular exhibition of the use of the imagi- 



