WHAT WE MIGHT EXPECT. 187 



2. From changed conditions and habits which render 

 the organ no longer necessary, or which lead the crea- 

 ture to lay greater stress on certain other organs or 

 modifications. 



3. From the wish of others outside itself; the effect 

 produced in this case being perhaps neither very good 

 nor very bad for the individual, and resulting in no 

 grave impression upon the organism as a whole. 



4. From a single deep impression on a parent, affect- 

 ing both himself as a whole, and gravely confusing 

 the memories of the cells to be reproduced, or his 

 memories in respect of those cells — according as one 

 adopts Pangenesis and supposes a memory to " run " 

 each gemmule, or as one supposes one memory to " run " 

 the whole impregnate ovum — a compromise between 

 these two views being nevertheless perhaps possible, 

 inasmuch as the combined memories of all the cells 

 may possibly be the memory which " runs " the impreg- 

 nate ovum, just as we are ourselves the combination of 

 all our cells, each one of which is both antonomous, 

 and also takes its share in the central government. 

 But within the limits of this volume it is absolutely 

 impossible for me to go into this question. 



In the first case — under which some instances which 

 belong more strictly to the fourth would sometimes, 

 but rarely, come — the organ should soon go, and sooner 

 or later leave no rudiment, though still perhaps to be 

 found crossing the life of the embryo, and then dis- 

 appearing. 



In the second it should go more slowly, and leave, it 

 may be, a rudimentary structure. 



