THE NEMATOID H^MATOZOA OV MAN. 259 



embryos in inducing disease is apt to be overrated, as it would 

 seem that the parasites may sojourn for long periods in the system 

 without inflicting obvious injury. That certain injuries are 

 effected, however, cannot well be doubted, but, judging from 

 what we know of the like condition in animals, the injuries 

 result, not from direct action of living organisms on the blood 

 current in which they dwell, but from their action on some of the 

 dehcate tissues through which the blood circulates — such in- 

 jurious influence, being probably exerted, more especially during 

 the migrations of the parents of future embryo-hsematozoa. 



Calcutta ; 



Juffus(, 1878, 



