.168 



ZOOLOGY. 



iemale is white and from eight to ten millimetres in length; 

 the male is only two or three millimetres long. 



The largest known round worm is the pahsade worm, or 

 Hustrongylus gigas Eudolphi, the female of which is a 



Fig. 114.— 0»- 

 yurif vermictda- 

 ris. a, male, nat- 

 nral size ; b. the 

 same enlarged. — 

 Aiwr Beuedcn. 



Fig. 115. — Oa^yarfe 

 vermiciUaTis, a, fe- 

 male, natural size ; &, 

 the same enlarged. — 

 After Beneden, 



Fig. il6.—7Yichocephaltadis- 

 par. rt, male, natnral size ; 6, 

 enlarged ; c, female, natiiial 

 size.— After Beneden. 



metre (about 39 inclies) in length, and the size of a qiiill ; 

 the male is one third as long. It is rai'e in man, and occurs 

 especially in the intestines, and sometimes the kidneys of 

 such mammals as live on fish. The moi\th is surrounded 



