OUR DOMESTICATED ANIMALS. 123 



already referred to, and in other places as indicated in the 

 separate bibliographies of the works just mentioned. 



Were it not for the really sensational, and therefore to 

 some extent offensive, title, I might also with pleasure 

 refer to an anonymous pamphlet by an M.R.C.S., vulgarly 

 entitled " How about Pork ? — Startling Revelations \" 

 It contains some useful information ; but the author 

 studiously ignores the researches of English helmintho- 

 logists, and writes in a style which is anything but 

 creditable to him. By far the best memoirs on Trichina 

 which have appeared in England are the two written by 

 Drs. Thudichum and Althaus respectively. For full 

 references to these and other works on the same subject 

 I must, however, refer to the bibliography of my general 

 treatise. 



Besides the three forms of entozoa above mentioned, the 

 hog harbours a variety of other interesting parasites. 



The flakes (Fasciola hejpatica and Distoma lanceolatum) 

 only very rarely occur, and, so far as I am aware, tape- 

 worms, as such, have never been found in swine ; but for 

 this loss they make up their share of guests by harbour- 

 ing two kinds of bladder-worms (Cysticercus tenuicollis 

 and Echinococcus veterinorum) . 



As already hinted, the nematodes are largely repre- 

 sented ; for, in addition to the Trichina and Stejphanurus , 

 we find the common round worm (Ascaris lumbricoides) , 

 several strongyloid worms (Sclerostoma dentatum, Sjpiro- 

 ptera strongylina, and Sir ongylus paradoxus) , and also two 

 other more or less closely allied nematodes (Trichocephalus 

 crenatus and Simondsia paradoxa) . 



In addition to these there is one other remarkable 

 parasite (Echinorhynchus gigas) , which, though fortunately 

 not of frequent occurrence in this country, is nevertheless 



