ECONOMIC IMPORTANCE OF NEMATODES. 321 



Vesophayostonium radiatuiii is found in the intes- 

 tine of cattle; Oe. coluvihianum in sheep and cattle; 

 Oe. 'venulosum in sheep and g-oats; Oe. dentatuni 

 in pigs. 



ChahertUi ovina is found in the large intestine of 

 sheep and goats. 



Agriostomuvi vryhurgi occurs in the small intestine 

 of certain cattle. 



Ancylostoma canimim, in the small intestine of 

 clogs and cats. 



Characostomuui longemucronatuni, in small intes- 

 tine of pig. 



Bunostomutii frigonocepJialum, in small intestine 

 of sheep and goats; B. phlehotomuiii in cattle. 



Gaigeria pachyscelis, in the intestine of sheep and 

 cattle. 



Gyalocephalus capitatiis is found in the large 

 intestine of mules. 



TriodontopJioi U.S minor and T . scriatus, in the large 

 intestine of donkeys. 



Cylicostoinuin.- — Tlie following species have been 

 found in the larg-e intestine of tlie horse and donkey:- — • 

 C. alceatum, auriculatuin, hicoronatxiin, calicatum, 

 catinatiun, coi'onatiun, elongatuui, lahiatuni, lahraUim, 

 nassatuin, pocidatuiii , radiatum and fefracanthum. 



OesophagodonUis robustus, in the caecum of the 

 horse and mule. 



Several species, occurring* in the digestive tracts of 

 cattle, sheep and goats, formerly referred to the genus 

 Strongylus, are now distributed in other genera. The 

 nomenclature of the Strongylidae is still difficult and 

 confused. Several sub-families, such as Metastrongy- 

 linae, Trichostrong'ylinae and Strongylinae have been 

 founded. Further investigation is needed. 



From the large intestine, especially the caecum of 

 the horse, the following species of Strongylus have been 

 recorded : .S'. equinus, edenfafux and vulgaris. 



Syngarjivs tracJiealis and S. hroncliialis occur in the 

 trachea and bronchi of fowls, pheasants, turkeys, pea- 

 cocks and geese, causing- "gapes"; S. laryngeus in 

 cattle; S. nasicola in goats. 



Stephanurns dentatus has been found in the adipose 

 tissue around the kidney of the pig. 



ASCABIDAE. 



Ascaris suuvi (s^lilhl) occurs in the small intestine 

 of pigs; A. avis in sheep; A. vitulorum in cattle; 

 A. megalocephala in horses; A. crassa in ducks; A. lon- 

 choptera in the elephant. 



Belascaris inarginata is found in the intestine of 

 dogs; B. inystax (~B. cati) in cats. 



Toxascaris Itmhata occurs in the intestine of the 

 dog and also accidentally in man. 



