288 ENTOZOA. 



1861), witli 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 he thoroughly de- 

 stroyed hy fire, tuhen practicable, and under no circumstances what- 

 ever should they be throivn 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 Meeting of 

 the British Association for the Advancement of Science, in 1862, and afterwards more 

 fully 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. 



