270 Veterinary Medicine. 



portion of the body. Male is 9 to 12 mm. long, with obtuse 

 caudal end, bearing several papillae the last of which bears a well 

 developed membraneous clasping apparatus. Spiculum is single. 

 Owa insymmetrically oval, with a button-like projecting operculum 

 at one end. 



Habitat. The caecum, colon, and rectum of .solipeds. It is 

 very common and often very abundant. 



Pathogenesis. Though not nearly so injurious as the blood- 

 sucking pin-worms (sclerostomata) yet the oxyuris when present 

 in large numbers will greatly impair the general health, produc- 

 ing indigestions, colics, diarrhoeas, general unthriftiness, anaemia, 

 pot-belly, pruritus ani, and the presence of a grayish fur round 

 the anus from the drying of mucus. The passage of worms with 

 the faeces serves to identify the true cause of these symptoms. 



Treatment is essentially the same as for ascarides though the 

 presence of the parasite in the large intestine only makes it more 

 difficult to reach. Injections are often used to advantage (quassia 

 infusion, benzine, naphthalin, etc.) 



Oxyuris yi2tS\xgoAt.^ {mastix whip, eidos form). The long- 

 tailed oxyuris like the oxyuris curvula has its distinguishing 

 features in the female. This consists in a prolongation of the tail 

 to three or four inches long. The para.site is found in the faeces, 

 or arrested in the anus, its long attenuated tail shrunken to a 

 delicate filament folded on itself longitudinally, and as if it had 

 just been delivered of its contingent of eggs. It has been noticed 

 by Nitsch and Friedberger in Germany, and Blaise and Condamine 

 in Algiers and France. It is quite common in New York. The 

 general characters closely resemble those of the oxyuris curvula, 

 so that Railliet holds it to be but a variation, shown in a dimor- 

 phism of the females. 



The habitat, symptoms and treatment are essentially the same as 

 for the oxyuris curvula. 



Sclerostoma Equinum. This is by far the most dangerous 

 of the intestinal worms of solipeds. For its description, ravages 

 and treatment, the reader is referred to the article on " Colic from 

 Verminous Embolism. ' ' 



Sclerostoma Tetracanthum, (tetra four, akanthos thorn). 

 The 4-toothed sclerostome, has a mouth like that of the sclero- 

 stoma equinum, in showing a circular row of sharp triangular 



