840 NEMATODA. 



PLATE X. 



Strongylus Tetracanthus, formerly described as Trichonema 

 Arcuata. 



Fig. 1. — Larva (slightly mag.) from mucous membrane of an Ice- 

 land pony. The worm was of a uniform rose colour. 



Fig. 2. — Head (mag. 80 diameters). 



Parasites of Grouse Disease. 



Fig. 3. — The parasites embedded in the mucous membrane of the 

 caecum (mag. 10 diameters). 



Strongyli prom Bronchial Tissue of a Three- year-old Sheep. 

 Fig. 4. — Magnified 80 diameters. 



Strongylus Filaria. 

 Fig. 5. — From lung tissue of a sheep (mag. 80 diameters). 



Parasite from Liver of a Domestic Fowl. 



Fig. 6. — The fowl had been fed on the flesh of an Iceland pony 

 infested with StrongyliLS tetracanthus. The whole of the 

 abdominal viscera of the fowl were covered with small 

 tubercular-looking objects containing worms, embedded in 

 a tough, almost cartilaginous substance (mag. 80 dia- 

 meters). 



