288 ENTOZOA. 



1861), with the view of lessening the prevalence of other entozoa, 

 both of man and animals, and I again invite attention to the im- 

 portance of observing this rule. All entozoa which are not preserved 

 for scientific investigation or experiment should be thoroughly de- 

 stroyed by fire, when practicable, and under no circumstances what- 

 ever should they be thrown aside as harmless refuse. In the case of 

 the Tcenia echinococcus, the greatest difficulty hkely to be expe- 

 rienced lies in the fact of the extreme smallness of this tapeworm. 

 As an additional security, therefore, I would recommend that boil- 

 ing hot water be occasionally thrown over the floor of all kennels 

 where dogs are kept, for in this way, not only the escaped tape- 

 worms, but also the little free embryos themselves would be effec- 

 tually destroyed.* 



* These prophylactic measures were first advocated at the Cambridge Meetiag of 

 the British Association for the Advaiicem.ent of Science, in 1862, and afterwards more 

 fally developed in my paper communicated to the Zoological Society, and published in 

 their Proceedings, vol. xxx., pt. 3, pp. 288 — 315. They have since been re-stated in the 

 pages of the " Intellectual Observer ;" and also, with approval, by Dr. Aitken, in the 

 second volume of the second edition of his valuable work on " The Science and Practice 

 of Medicine," p. 110. 



