136 Brain : 



The general conclusion has obtained that evolution in 

 the ordinary sense has terminated in man, and that he is 

 not only the latest but in all probability the last of the 

 mammalia. A great deal in human creed, mythic, classic, 

 and Christian, has originated here, namely, on the hope- 

 lessness of doing much better on the earth ; and hence the 

 prayerful appeal for a more favorable theatre for life else- 

 where. 



The apparent cessation of evolution on the earth has 

 long been felt to be disheartening ; literature is burdened 

 with it and aspiration concerning some other better state 

 of existence has grown out of it. 



But has evolution ceased? The question, which the 

 anatomist and biologist have been not a little inclined to 

 answer in the affirmative, is exceedingly important to the 

 morals of humanity. Has the anatomist, the biologist or 

 the physiologist overlooked any point, any particular, or 

 any capacity by virtue of which man may still demonstrate 

 himself progressive and take heart for himself and his 

 race? 



It is the purpose of this brief paper to call attention to 

 one important tissue of the human organism which can be 

 shown to have been steadily progressive, and which gives 

 no evidence of reaching, or of tending to reach, type 

 limits. 



I shall show furthermore that it is by virtue of the 

 steady gro-^th and development of this part of the body 



