248 
Nematodes in Sheep 
Family ANGIOSTOMIDAE. 
12. Strongyloides papillosus Wedl. 
{Rhahdonema longus Grassi and Segre.) 
I have met with this species on one occasion only, a single specimen 
was found in the small intestine of a sheep from the Birmingham 
slaughter houses. The specimen measured 5-4 mm. in length by 
55 jx in maximum thickness. The thin-shelled eggs were 48-50 fx 
long by 20-23 fx wide. 
Family TRICHINELLIDAE. 
13. Trichuris ovis Abildgaard. 
{TricJiocephalus affinis Rudolphi.) 
This is perhaps the commonest of all the parasites of the alimentary* 
tract. I have found specimens in the large intestine of almost every 
sheep I have examined. T. ovis usually occurs in small numbers; on 
one occasion, however, I collected more than 250 of these worms from 
a single intestine. 
REFERENCES. 
Looss, A. (190.5). Notizen zur Helminthologie Aegyptens vi. Das Genus Tricho- 
strongylus n.g. , mit zwei neuen gelegentFchen Parasiteii des JMenschen. 
Centralbl. f. Balt, etc., i Abt., Originale, xxxix. pp. 409^22. 
Railliet, a. et Henry, A. (1912). Observations sm- les Strongylides du geni’e 
“ Nematodirus.” Bull. Soc. Path. Exoi. v. pp. 35-39. 
Ransom, B. H. (1907). Notes on Parasitic Nematodes, including Descriptions of 
new Genera and Species and Observations on Life Histories. U.S. Dept. Agr., 
Bur. Animal Ind., Circ. 116, pp. 1-7. 
- (1911). The Nematodes Parasitic in the Alimentary Tract of Cattle, Sheep, 
and other Ruminants. U.S. Dept. Agr., Bur. Animal Ind., Bull. 127, pp. 1-132. 
EXPLANATION OF PLATE XIX. 
Odtertagia trifurcata Ransom. 
Fig. 1. Male; anterior extremity. x 300 diameters. 
Fig. 2. Male ; posterior end of the body with the spicules and bursa, x 300 diameters. 
Fig. 3. Male ; right spicule, ventral view. x 600 diameters. 
Fig. 4. Male ; gubernaculum, ventral view. x 600 diameters. 
Fig. 5. Female ; posterior end of the body. x 300 diameters. 
