OUR DOMESTICATED ANIMALS. 77 



corded by Sollmann in the Coburger Zeitung. The well- 

 known lamb -disease, though generally supposed to be 

 due to the presence of a single species of worm called the 

 Common Lung Strongle, or Strong ylus filar ia, is in 

 reality due to the occurrence of at least two different 

 parasites belonging to the same group. For years past 

 it has been known to Continental helminthologists that a 

 second species of nematode worm is usually associated 

 with the above-named parasite, the form in question 

 having been originally described by Professor Leuckart, 

 under the title of Strongylus rufescens. I am the more 

 desirous of calling attention to this fact since Dr. Crisp 

 (an earnest worker in the cause of parasitology) believes 

 that he has discovered a new worm in the lungs of lambs 

 and sheep, which he calls a Gordius. 



I entertain no doubt that Dr. Crisp's gordian worm 

 is the adult representative of the immature worm found 

 by Professor Brown some years ago ; fresh specimens 

 having also recently been examined by Mr. Axe and 

 myself. This so -yclept gordian worm is a large species 

 of strongle, which, in contradistinction to the common 

 lung strongle, I am in the habit of speaking of as 

 the Long Strongle ; and I think this designation is 

 particularly convenient, because the parasite, in its full- 

 grown state, acquires a length of from six to seven inches, 

 or, as Leuckart affirms, it may be a span long. 



Dr. Crisp conjectures that his {< gordii ultimately 

 become the strongyli," and in this assumption of genetic 

 relationship he is probably correct when speaking of the 

 young, although such a developmental connection could 

 certainly not obtain if it were true that his supposed new 

 worm were realty a Gordius. 



The Danish helminthologist (Dr. Krabbe, of the Copen- 



