ANKYLOSTOMIASIS 



315 



The disease was perhaps Icnown ;incl treated b\' the ancient 

 Egyptians 1,350 years B.C. 



B 



A B 



A, A, head and tail of male, Aiicylostoina duoJenale ; v., B, head 

 and tail of male Necator americanus ; x, x, dorsal rays. 







Ancylostoiiia duodenale : eggs in different siages of development, a to c, in fiesh fiieces ; 

 d, conlaining a larva, only in old faeces. X 336. (After Looss.) 



Two long and slender spicules can often be seen projecting through 

 the opening of this bursa. 



