66 



and called Candirii is or are a nuisance is certain. Whether the widely 

 distributed belief that the Candiriis are tropic to urine and consequently 

 have a tendency to enter the urethra, or whether the candirii's tendency 

 to burrow leads them accidentally to enter the urethra are all matters 

 that must, for the present, remain in debate. A very interesting sub- 

 sidiary question is whether, if Candirus are tropic to urine, they do not 

 also enter the urethra of aquatic mammals and large fishes. Further 

 study may demonstrate that some species of Candirus have become para- 

 sitic in the bladder of large fishes and aquatic mammals. These are all 

 questions that may legitimately be taken up by the expeditions that will, 

 I hope, result from this article. 



