H^MONCHUS CONTORTUS 



437 



of bursa 150 p by 125 //, attached to left lateral lobe. Posterior 

 ray bifurcate ; each branch bifid. Stem of ray less than twice as long as 

 its branches. Spicules 300 p, to 500 p with knobbed tips, and the left 

 spicule with a barb 20 //, from the tip, right spicule with a barb 40 p 



from tip. Gubernaculum 200 //, by 

 25 //, to 35 //,, fusiform with thick- 

 ened edges. 



Female 18 to 30 mm. by 500 //, 

 (maximum). Vulva 3 to 4*5 mm. 

 vt from tip. Linguiform flap 0*5 mm. 



(a second one exists, according to 

 Brumpt). Anus 400 p to 630 fj, from 

 tip. Tail acutely pointed. Eggs 75 //, 

 ..-int. to 95 fjb by 40 //, to 50 p. 



FIG. 315. Hamonchus contortus: 

 vulval region of female viewed from 

 left side, int., intestine; lab., lingui- 

 form process covering vulva ; ov., ovary ; 

 cvij., ovejector ; ut., uterus; vag., 

 vagina ; vul., vulva. X 75. (After 

 Ransom.) 



FIG. 316. Hcemonchus contortus: tail of 

 male, dorsal view, d., posterior ray of the asym- 

 metrically placed posterior lobe; e.d. , postero- 

 external ; /./., postero-median ; m.l., antero- 

 median ; <?./., antero - external ; /.#., latero- 

 anterior ; v.v., antero-anterior ; gub,, guberna- 

 culum ; sp., spicule. x 75. (After Ransom.) 



Habitat. Fourth stomach of cattle, sheep, antelope. 

 Distribution. Europe, America, Africa, Asia, Australia, New 

 Zealand. Once in man in South America by de Magalhaes. 



Pathology. Produces anaemia, emaciation, dropsy in sheep ; and 



