Inheritance of Acquired Characters 253 



protrusion of the eye on the same side, and further, that he 

 had " also had many cases in which some of the progeny of 

 parents thus affected have shown considerable protrusion 

 of the eyeballs of both sides, and this seemingly abnormal 

 protrusion has occasionally been transmitted to the next gen- 

 eration. Nevertheless, I am far from satisfied that this latter 

 fact is anything more than an accidental coincidence." This 

 reservation is made on the ground that the protrusion in the 

 young is never so great as in the parents, and also because 

 there is amongst guinea-pigs a considerable amount of in- 

 dividual variation in the degree of prominence of the eye- 

 balls. Romanes, while unwilling to deny that an " obviously 

 abnormal amount of protrusion, due to the operation, may be 

 inherited in lesser degree," is also unwilling to affirm so 

 important a conclusion on the basis of these experiments 

 alone. 



In regard to Brown-Sequard's 6th statement, Romanes found 

 after injury to the restiform body that haematoma and dry 

 gangrene may supervene, either several weeks after the 

 operation, or at any subsequent time, even many months 

 afterward. The disease usually affects the upper parts of 

 both ears, and may then gradually extend downward until 

 nearly the whole ear is involved. " As regards the progeny 

 of animals thus affected in some cases, but by no means in 

 all, a similarly morbid state of the ears may arise apparently 

 at any time in the life history of the individual. But I have 

 observed that in cases where two or more individuals of the 

 same litter develop this diseased condition, they usually do so 

 at about the same time, even though this may be months after 

 birth, and therefore after the animals are fully grown." More- 

 over, the morbid process never extends so far in the young as 

 it does in the parents, and " it almost always affects the middle 

 third of the ear." Several of the progeny from this first gener- 

 ation, which had apparently inherited the disease, but had not 

 themselves been directly operated upon, showed a portion of 



