160 PARASITOLOGY 
proboscis armed with six rows of hooklets, which 
irregularly alternate. Its body presents transverse 
markings. 
Condition Produced.—Exhaustion, tucked up abdo- 
men, muscular incoordination, later paralysis, loss of 
appetite and death —ParRKER. 
TREMATODA (Trematodes—flukes). 
The order Trematoda belongs to. the class Plat- 
helmintha and includes a group of worms that are 
commonly called flukes. They produce a disease 
called Distomiasis or Distomatosis, which is divided 
inte various forms viz.: 
Hepatic Distemiasis caused by the Distoma 
Hepaticum, Distoma Americanus, Distoma Lanceo- 
lata. 
Pulmonary Distomiasis caused by the Paragoni- 
mus Westermanii. 
Gastric Distomiasis caused by the Amphistoma 
Cervi. 
Vascular Distomiasis caused by the Schistosoma 
Bovis. 
