THE DESCENT OR ORIGIN OF MAN 23' 



jeelles qui existent entre I'enc^phale de I'liomine et celui 

 des singes sup^rieurs, sont bien minimes. II ne faut pas se 

 faire d'illusions k cet %ard. L'homme est bien plus pr^s 

 des singes anthropomorphes par les caract^res anatomiques 

 de son cerveau que ceux-ci ne le sont non-seulement des 

 autres mammif^res, mais mSme de certains quadramanes, 

 des guenons et des macaques." But it would be superflu- 

 ous here to give further details oh the correspondence be- 

 tween man and the higher mammals in the structure of the 

 brain and all other parts of the body. 



It may, however, be worth while to specify a few points, 

 not directly or obviously connected with structure, by which 

 this correspondence or relationship is well shown. 



Man is liable to receive from the lower animals, and to 

 communicate to them, certain diseases, as hydrophobia, vari- 

 ola, the glanders, syphilis, cholera, herpes, etc. ;° and this 

 fact proves the close similarity* of their tissues and blood, 

 both in minute structure and composition, far more plainly 

 than does their comparison under the best microscope, ®r 

 by the aid of the best chemical analysis. Monkeys are lia- 

 ble to many of the same non-contagious diseases as we are; 

 thus Eengger,' who carefully observed for a long time the 

 Cebus Azarce in its native land, found it liable to catarrh, 

 with the usual symptoms, and which, when often recurrent, 

 led to consumption. These monkeys suffered also from 

 apoplexy, inflammation of the bowels, and cataract in the 

 eye. The younger ones when shedding their milk-teeth 

 often died from fever. Medicines produced the same effect 

 on them as on us. Many kinds of monkeys have a strong 



' Dr. "W. Lauder Lindsay has treated this subject at some length in the 

 "Journal of Mental Scienoe," July, 1871; and in the "Edinburgh Veterinary 

 Eeview," July, 1858. 



S* A Reviewer has criticised ("British Quarterly Review," Oct. 1, 1871, 



^feB 2) what I have here said with much severity and contempt; but, as I do 



-gluse the term identity, I cannot see that I am greatly in error. There 



^ra to me a strong analogy between the same infection or contagion pro- 



«„jig the same result, or one closely similar, in two distinct animals, and the 



i of two distinct fluids by the same chemical reagent. 



if'NaturgeBchichte der Baugethiere von Paraguay," 1830, s. 50. 



